(bright music) [Narrator] The spirit of progress has always been a driving force of human civilization.

(car engine revving) From the moment the wheel was crafted, we embarked on an unceasing journey, pushing boundaries, overcoming the limitations of time and space, and charting new courses across land, over water, and into the skies.

Planes, trains, and automobiles stand as enduring symbols of this relentless innovation, continuously transforming how we move, how we live, (car engine purring) and how we dream.

(pensive music) (air whooshes) (air whooshes) (air whooshes) (air whooshes) (air whooshes) (train horn blaring) (soft music) In the early 19th century, the fate of the world was tied to the slow, hardworking movement of the horse-drawn carriage.

But that pace was upended by a machine with once unimaginable power.

Enter the iron horse, an invention that kick-started the age of modern transportation.

The steam engine fueled the Industrial Revolution with new possibilities in work and living, shrinking distances by connecting the world like never before.

Since the first steam locomotive thundered to life, trains have done more than transport goods and people.

They have forged connections, bridged distances, and transformed the course of human history.

From the most modern high-speed rails to the vintage charm of the world's legacy engines, each of these engineering marvels has a story to tell, chugging along tracks in every corner of the world, even some of the most rugged corners.

(lighthearted music) (air whooshing) The landscape of western Tasmania remains one of the most remote regions in all of Australia.

With a population of barely 1,800, Queenstown still looks and feels like a frontier outpost.

Surrounded by treeless hills, the town's eerie beauty is the result of 100 years of mining and smelting.

(people chattering) (soft music) In the late 1800s, a rich source of copper was discovered here.

But ancient forests and undulating hills stood between the copper deposit and the ships waiting on the west coast.

So, the West Coast Wilderness Railway was born, a 35-kilometre train line, cut by hand through the dense and rugged terrain.

Steep gradients pushed the 19th century technology to its limit, but the miners were determined to link the mine and the port at any cost.

Tunnels were excavated, bridges were built over deep ravines, and track was laid through dense forest, all with manual labour and limited technology.

In 1897, the first section of rail entered operation.

It remains the steepest steam line in the Southern Hemisphere, made possible by incredible engineering.

The Abt rack-and-pinion system allows trains to climb steep gradients that would be impossible with standard rails.

Still in use today, the system, designed like the workings of a clock, uses a central cog under the train to interlock with teeth on a third rail track, pulling the train up and over the rugged isolated mountains.

The system is rare, with only a few railways in the world using it.

Affectionately known as the Rainforest Railway, the track from Queenstown to the west coast port of Strahan declined as the mines dwindled and roads opened.

But in the 1990s, it was restored as a popular heritage experience.

But while this little Tasmanian legacy may be remote, its impact rings out globally.

That original mining outfit ultimately became BHP, one of the top five copper miners in the world today, with operations on every continent except Antarctica.

The West Coast Wilderness Railway is more than tracks through a landscape, it's engineering taking on nature.

And as steam engines still chug away across the world, we are reminded of the romance and power of this transportation marvel.

The development of train lines like the West Coast Wilderness Railway inspired other engineering feats across the globe.

Engines weighing hundreds of tonnes needed tracks to be laid through the heart of mountains and valleys, demanding ever greater bridge and tunnel design.

As rail networks grew, the efficiency of new railway stations became an art form, and nowhere is this more on display than the world's alpine destinations.

(light music) (air whooshing) Sitting on the edge of Lake Geneva is the resort town of Montreux.

In Roman times, it marked a fork in the road between Italy and France.

But today, it's the gateway to the Swiss Alps.

Switzerland boasts the highest rail usage in Europe and it's easy to see why.

The railway network that runs from Montreux and winds its way through the region's snow-capped peaks is a marvel of transportation ingenuity.

The network was established in 1899, and the first section of the railway between Montreux and Les Avants began operating in 1901.

By 1905, the entire 62.4-kilometer route to Zweisimmen was completed, making it the first fully electrified railway line of its size in Switzerland.

Catering to townships in all kinds of terrains and altitudes, the rail network encompasses different track widths, known as gauges, to help trains traverse the Alps.

It's a technological feat that keeps people moving and connects mountain communities to one another.

The Montreux Railway offers eight services, including one of Switzerland's oldest electric railways and a cogwheel train, employing a system similar to the West Coast Wilderness Railway, which powers these impressive trains up the steep Swiss inclines.

It's a perfect blend of historic charm and engineering mastery in one of the most spectacular regions of Europe.

But it shows the power of trains to revolutionise countries and economies and also, amazingly, our very concept of time.

(lighthearted music) In the mid-19th century, towns across America operated on their own individual clocks, based on the position of the sun.

But with trains crossing the country, the development of schedules demanded all stops synchronise to a standardised time.

America's Transcontinental Railway linked the country from the Atlantic to the Pacific, but it was another American railway far to the north that would push engineers to the limits of innovation.

(pensive music) (air whooshes) In the far reaches of the Great White North, Alaska remains one of the United States' wildest terrains.

It's home to Denali, America's tallest peak, and its northernmost railway: the Alaska Railroad.

With an annual load of more than 400,000 passengers, over 4.5 million tonnes of freight, and over 1,000 kilometres of track, the railroad is absolutely critical to the state's prosperity.

Routes are powered by 57 locomotives, thousands of freight cars, and 45 passenger carriages, including six GoldStar dome cars.

In 1896, when gold fever struck, waves of fortune-seekers flooded the remote township of Fairbanks, driven by dreams of untold riches.

But with Fairbanks' isolated deep inland, a lifeline was desperately needed, a railway to link it to the distant port of Anchorage.

The task was nothing short of brutal, carving tunnels through unforgiving mountains, threading tracks across unstable fault lines, all while battling the constant threat of avalanches.

(soft music) This was not just a railway, it was a battle against the elements, fought with grit and sheer determination.

Burdened by financial turmoil and haunted by bankruptcy, the gruelling 20-year construction finally saw completion in 1923.

It was such a transportation marvel, it even shaped the population of Alaska, turning a small tent town into Anchorage, the state's biggest city just a century later, and the once-isolated city of Fairbanks a close second.

In recent years, the rail's impact upon the Alaskan wilderness has become a greater focal point, with improvements to energy and water consumption as well as lower emissions, earning the railroad a Green Star Certification.

This evolution has helped the Alaskan Railway remain a lifeline for many remote communities, and one of the last railroads in North America to offer a flag stop service.

In remote areas, passengers can wave down the train from anywhere along the route, allowing them to board or disembark even in the middle of nowhere.

This service is vital for those living off the grid in Alaska's wilderness and ensures the track will remain a part of Alaskan life for some time yet.

But where Alaska's rails cut through the state's icy wilds, a different type of rail conquered the chaos of urban sprawl, delving deep underground to carve order from disorder.

Subway systems are the backbone of the world's mega-cities, where bustling economic powerhouses rely on the seamless movement of millions each day.

Subways cut through the heart of concrete jungles, like vital arteries channelling the flow of urban life.

Beneath the surface, an intricate network of tracks and stations powers the relentless movement of people, ensuring our sprawling metropolises remain in constant, harmonious motion, alleviating congestion and sustaining the vibrant pulse above.

But one subway rises above the rest, not just in scale but in legacy.

It's the blueprint of modern urban transit and birthplace of underground rail travel.

Here, deep below the city's hustle, the journey into the heart of urban mobility was born, setting the standard for subway systems worldwide.

(upbeat electronic music) (singer vocalising) (air whooshing) With the British Empire at its height, the world's first subway opened in its capital in 1863.

London Underground started its life with only six stations between Paddington and Farringdon.

The early underground was powered by steam and poorly ventilated too, making it a pretty uncomfortable journey.

But electrification in the 20th century removed the issue of exhaust, giving passengers a better experience and allowing the network to expand.

(singer vocalising) 160 years after it first opened, the Tube services 272 stations linked by 400 kilometres of track and 543 trains.

Today, this mammoth feat of engineering is capable of carrying 5 million passengers a day, making it one of the largest transport systems in the world.

(people chattering) (upbeat music) The introduction of automated trains and advanced signalling systems has increased the frequency and reliability of services, with trains running every two to three minutes at rush hour.

With such a busy network, a clear map was needed to make sense of it.

(air whooshes) In 1933, London's first map of the Tube simplified the complexity of the system.

Its non-geographical layout revolutionised the way people navigate complex transport systems and has been emulated by metros worldwide.

From its pioneering beginnings as the world's first underground railway to its current status as a global icon of urban mobility, the Tube has become a cornerstone of London life.

But as large as the Tube is, it's not the biggest.

(uptempo music) If ever there was a city that was defined by its public transport, it's New York.

And its subway has grown to become the largest in the world, with an incredible 472 stations.

In the late 1800s, the streets of New York were becoming more and more congested with horse-drawn carriages and trolleys.

To solve this problem, the city introduced elevated railways, known as "els".

Though effective, they were noisy and ugly.

(train screeching) (air whooshes) Opening to the public in 1904, New York's subway changed the city forever.

40% of the network still runs along elevated sections, but forms part of a system that services over 1,000 kilometres of track, moving more than 3 million people between the city's five boroughs every day.

It's one of only a handful of subway networks around the world that serves its city 24 hours a day every day of the year, making it the city that never sleeps.

(people chattering) Beyond its capabilities and statistics.

New York's subway is in so many ways a microcosm of its unparalleled diversity.

In a city often divided by wealth and opportunity, the subway stands as a rare equaliser, a place where humanity intersects and socioeconomic lines blur.

While carrying more than 1.1 billion people every year is an impressive feat of public transit, there's a place that puts those numbers to shame.

(air whooshes) (light music) Tokyo, Japan, the world's most populated urban area and home to more than 14 million people.

The city's subway system was a bewildering task, turning rush hour chaos into order and efficiency.

So busy is the subway that stations employ pushers or "oshiya" on the platforms to cram passengers into the cars.

The Tokyo subway system and its metro lines carry almost 6 million passengers per day, double that of New York's massive network.

Navigating the network can be a baffling experience for a beginner.

It requires planning, attention to detail, and even a little code-breaking, with 13 lines, a meticulously organised code of colours, letters, numbers, and names correspond to services, entries, exits, and platforms.

But with the code understood, passengers can unlock a truly optimised system, steeped in the rules of Japanese etiquette and clockwork precision.

To minimise faults on the network, drivers will spend their entire career on a single line, getting to know its intricacies to stick to the timetable, (soft music) while repair crews avoid delays with nightly maintenance.

About a century old, the subway is an indispensable part of life in the dynamic metropolis, reliable enough to keep car ownership relatively low, desirable in a city where space is at a premium.

But while travelling underground makes movement efficient, it lacks the charm that comes with the train's distant cousin.

Cable cars and trams glide through cities at street level with a grace that bridges the past and present, offering a more intimate connection with the city.

In one port city on America's west coast, cable cars have become part of the city's identity.

(bright music) (air whooshes) San Francisco was forged during the wild days of the Gold Rush in 1848.

In those early days, the job of pulling passenger carriages up the city's steep hills unfortunately fell to horses.

But in 1873, Frisco launched its very first cable car service, setting a new standard for the city's urban transport.

Inspired by gold mining carts, the city's cable cars use a network of underground moving cables.

Each car has a large clamp that extends through a slot in the street to latch onto the moving cable, pulling the car uphill.

Downhill, the clamp releases, allowing gravity to take over while the gripman controls the speed with brakes.

At its peak in 1901, San Francisco had 23 cable car lines, dominating transport on its steep streets.

Over time, electric streetcars replaced most of them, leaving only three lines today, the last manually operated cable cars in the world.

There's also a certain magic about them that's unlike any other form of public transport, making them a true marvel of transportation.

Across the other side of the globe, there's another city that boasts Victorian elegance and modern vibrancy.

(lighthearted music) (air whooshes) Its laneways whisper secrets of art and coffee, while trams carry passengers through its historic streets.

Thanks to its own gold rush in the 1800s, Melbourne, Australia, was one of the richest cities in the world.

And those riches provided the means to expand the city and move its people via the largest tram network on earth.

Intricately woven into the city's stark grid layout, tram lines thread through wide boulevards and narrow laneways alike.

Designed to connect diverse neighbourhoods, the network radiates from the bustling heart of the CBD, extending its reach to the suburbs.

While most Australian cities dismantled their tram networks in the mid-20th century, Melbourne chose a different path.

As pressure mounted to replace trams with buses, some lines were closed.

However, the people of Melbourne rallied against the decline, fiercely advocating for their beloved trams.

The decision proved wise, as Melbourne seemingly sidestepped the pitfalls of car-only streets, avoiding the heavy congestion that plagued other cities as the 20th century progressed.

Melbourne's dedication to its tram network has done more than just preserve an efficient public transport system, it has shaped the city's unique identity and practises, like the hook turn, where cars turning right must wait in designated left-hand side lanes, allowing trams to maintain their priority on the main roads.

These turns, strange to outsiders but second nature to Melburnians, are symbolic of the city's commitment to a coexistence between car and tram.

Today, Melbourne's trams are more than just vehicles.

They are moving landmarks, weaving through the city's streets.

As Melbourne's trams glide through its vibrant streets, a world away in Europe, trams clatter along steep hills and narrow alleys, carrying echoes of a city's past.

(soft music) (air whooshes) Lisbon, the City of Seven Hills, is a rich collection of history, culture, and vibrant colour.

In 1873, the same year San Francisco's cable cars first climbed their sloping streets, Lisbon set off on its own tram journey.

Known as Electricos, these iconic yellow trams have been trundling along Lisbon's cobbled streets for over 150 years.

They're a living connection to the past, weaving through the city's narrow, winding lanes.

(bright music) Uniquely designed to conquer Lisbon's challenging terrain, routes snake up steep hills, around sharp turns, and through tight alleyways, effortlessly navigating paths where buses and cars would struggle.

There are six lines, with 58 trams currently in operation, 40 of which are vintage streetcars, serving as a practical mode of transport carrying millions of passengers annually.

Lisbon's trams are technical marvels of transport engineering.

The classic Remodelado models are equipped with powerful motors so that they can climb steep streets with ease, while their compact size allows them to fit into Lisbon's narrowest lanes.

Their polished wooden interiors and brass fittings are built to withstand the forces of the city's inclines, and their environmentally friendly design and efficiency ensure they remain a crucial part of Lisbon's sustainable future.

As Lisbon trams wind through narrow streets and steep hills, another journey unfolds on the opposite side of the globe, one where the horizon blurs and speed and innovation replace tradition.

(lighthearted music) In the 1950s, post-war Japan was booming.

The 1964 Tokyo Olympics on the horizon, and the need to connect the country's cities and regions across its four main islands became a high priority.

The solution would set a world first.

On the eve of the Olympics, Japan introduced its first Shinkansen, better known in the English-speaking world as the bullet train.

It's a wonder of engineering that changed the world of rail transport forever.

Rocketing through the countryside at speeds of up to 320 kilometres per hour, the journey from Kyoto to Tokyo, which traditionally takes six hours by car, takes a little over two hours by Shinkansen, stops included.

And unless you really want to drive, the Shinkansen is the most efficient and comfortable way to explore Japan.

With nine lines crisscrossing the country, each train carries over 1,000 passengers.

On board, the Wi-Fi is free and the bento box lunches and endlessly amazing views are plentiful.

But don't let the modern amenities distract you from the miracle of the bullet train itself.

The fastest Shinkansen in the network has clocked up an experimental speed of 443 kilometres per hour, more than 1/3 of the speed of sound.

But despite their near supersonic speed, these transportation marvels are incredibly safe.

Intricate braking systems and computer control have given the bullet trains a spotless record, with no fatal accidents in their 60-year history.

It may be hard to conceive of modern Japan without them, but the Shinkansen are streamlined icons that nearly didn't happen.

Bullet trains were first considered in the '30s, but after the war, it was looking like Japan would follow America's lead and focus on air and road transport.

But the head of Japan's railways persisted with the idea, and despite budget blowouts, the gamble paid off.

Today, Japan's bullet train still sets the gold standard for high-speed rail globally, with next-generation services running through Europe, China, and Morocco.

High-speed trains remain a superb alternative, costing less and using just 12.5% of the energy required by air travel.

But even though it's also up to three times faster than driving, it didn't stop the 20th century dominance of individual vehicles.

The birth of the automobile didn't just change how we moved around, it also changed the world itself.

New roads had to be built.

Manufacturing industries were revolutionised.

We needed oil and gas, and lots of it.

It wasn't until the late 1800s that the first truly modern car appeared.

Inventor Karl Benzs put his name to the first of its kind, an automobile powered by an internal combustion engine.

Over the decades, Benz and other manufacturers improved car technology and the way they looked.

Cars became fashion items, with different styles reflecting the tastes of different eras and different levels of wealth.

But in the second half of the 20th century, Japan made major inroads into the industry.

After World War II, Japan's automotive industry grew rapidly, with companies like Toyota, Nissan, and Honda becoming global leaders.

Their relentless pursuit of perfection led to breakthroughs in safety, fuel efficiency, and sustainability.

Japan made cars that were smaller, more efficient, and more affordable than those from Europe or America.

The Toyota Corolla has sold more than 50 million units since 1966, a testament to this legacy.

In 1997, the company also pioneered the first mass-produced hybrid, the Prius.

Toyota has continuously pushed the boundaries of automotive technology.

Today, Toyota is intensifying its focus on boosting the range of battery electric vehicles to more than 1,000 kilometres, marking a significant leap in efficiency and sustainability.

But while Europe can lay claim to the car's conception, and Japan gets top marks for modern evolution, it was the United States that made it a symbol of freedom, independence, and status.

But for that to happen, America first had to change how cars were made.

(upbeat music) (air whooshes) Motor City, USA.

Detroit, Michigan, is synonymous with American car culture.

Long a hub of automobile manufacturing, and even the soundtracks that pump through car stereos from Motown to techno, there's little doubt the hard driving sounds of Detroit's music were inspired by the mechanical rhythms of its auto assembly plants.

At its height, almost 300,000 workers were putting cars together in Detroit's factories, split across the major firms, General Motors, Chrysler, and the company that kicked it off: Ford.

In 1903, Henry Ford started the Ford Motor Company in the city.

Then, in 1913, Ford transformed manufacturing with the assembly line, allowing the production of cars to be completed much faster.

Workers mastered specific tasks as vehicles inched forward, piece by piece, turning a painstaking process into a streamlined operation.

By the end of that same year, the United States was producing around 80% of the world's motor vehicles.

It was a watershed moment.

Cars became cheaper and ownership became a possibility for more people, which led to that other icon of the American way of life: the open road.

(uptempo music) In 1926, the United States blazed a new trail, inaugurating its first federal highway system, laying the foundation for modern road travel.

Thousands of miles of turnpikes and interchanges became transport marvels in their own right, including one two-lane blacktop that became so famous it was dubbed Route 66, the Mother Road.

Established in 1926, the route became the first all-weather highway connecting Chicago and Los Angeles.

After World War II, the mass production of cars set off a cultural revolution, giving Americans everywhere the power to travel independently and spontaneously.

The automobile took its place as a pillar of the American lifestyle, and Route 66 came to symbolise optimism, individualism, and freedom.

It became the stuff of legends.

Rebellious beatniks broke away from the constraints of post-war America and followed the road to new horizons, both literally and philosophically.

However, as America's roads' needs grew, the golden era of 66 was bypassed by the Interstate Highway System.

The need for ever faster and more efficient roadways took traffic away from the communities that had once flourished along the route.

In 1985, the last segment of the famous old route was decommissioned, but its free spirit lives on in the highways and byways of America.

(soft music) On their own, automobiles may be wonders of engineering, but in many ways their true marvel lies in the great pilgrimages they make possible.

All around the world, our ability to drive and explore has created some truly iconic car journeys, rites of passage that fuse our sense of discovery with the landscapes and cultural touchstones that make us who we are.

(gentle music) With a population the size of Texas spread across a landmass the size of the United States, Australia is a country defined by space and distance best experienced by road.

The off-road demands of its vast desert heart make four-wheel drives essential, and the highways and byways up and down its east coast are tailor made for camper van culture.

240 kilometres of asphalt spread along Australia's southeastern coastline is one of the world's most freeing drives.

Just as the beatniks discovered on America's Route 66, freedom isn't a destination, it's the journey itself.

The Great Ocean Road spectacularly unfolds with every curve, tracing Australia's rugged coastline.

Inspired by the growth of national park tourism in the United States and Canada in the early 1900s, the scenic route was built as a project for Australian soldiers returning from World War I. It is said to be the longest war memorial in the world.

The roar of the southern ocean accompanies the roar of the engine, as cliffs out the passenger window rise, fall, then disappear into the rear-view mirror.

There's no feeling like the open road, where every kilometre brings a new horizon.

It's where the true spirit of freedom thrives, unbound and limitless.

Further east along Victoria's southern coast, Phillip Island captures the imagination with its famous penguins who waddle up the beach every evening.

But it's also the place where engines roar around the Phillip Island race circuit.

Well known as the venue for the annual MotoGP, everyday people don the riding gloves and try their hand at racing.

Humanity has a long history of seeing who is the fastest at something.

And once cars were invented, it was only a matter of time before someone wanted to race them.

It marked the start of a thrilling chapter in automotive history.

Race car engineering marries precision with innovation.

Weight reduction, engine tuning, reinforced chassis, and advanced suspension systems push the limits to maximise speed and handling for optimal performance under extreme conditions on the track.

The extreme aerodynamic efficiency of race cars generates downforce greater than their weight to help them grip the road.

So great is this force, Formula 1 cars can theoretically drive upside down at high speeds.

But when it comes to sports cars, there's just one that symbolises automotive artistry.

(air whooshes) Ferrari.

Time bends as the world blurs by, each corner handles with razor-sharp accuracy as the car grips the asphalt.

Ferrari has a history of relentless innovation and engineering mastery.

Born from the passion for racing, every Ferrari embodies a fusion of cutting-edge technology and handcrafted precision.

From the roaring V12 engines to the carbon-fibre chassis, Ferrari's history is a testament to speed, elegance, and unyielding pursuit of perfection.

(car engine revving) But as the engine growls, it's a reminder of the sheer power that comes with a combustion engine, a power that comes with environmental consequences.

But the advent of hybrid racing represents another leap forward, blending electric and mechanical prowess.

These machines, born from racing's relentless pursuit of perfection, symbolise the future, where sustainability doesn't compromise performance but enhances it.

And the technology is helping everyday drivers see the potential of electric vehicles.

EVs, as they're known, are no longer just the underdogs.

They're taking centre stage at motor shows worldwide, drawing the spotlight from the traditional internal combustion models that Karl Benz invented.

Well-known brands like Toyota and Mazda are pushing the boundaries, showcasing sleek designs, cutting-edge technology, and performance that rivals and often surpasses their gasoline-powered predecessors.

These vehicles aren't just eco-friendly alternatives, they're redefining what cars can be, blending sustainability with speed, style, and innovation.

With battery range for some models now exceeding 800 kilometres on a single charge and acceleration for sports models taking you from 0 to 100 in under three seconds, EVs are proving their worth.

It's no wonder global EV sales are booming.

One in five cars being sold now are electric.

That's a remarkable 35% increase year over year.

As more and more people take up electric cars, production must scale up to make vehicles available and affordable.

(air whooshes) Sprawling across the desert, the Tesla Gigafactory hums with ambition, producing batteries that power a global shift toward sustainability.

Here, innovation meets scale, as Tesla's vision for a cleaner world takes tangible form.

And as EVs continue to evolve, become smarter and more efficient for drivers, we start to wonder if we will actually need drivers at all.

But after a decade of hype, promising a driverless future that's right around the corner, the sales pitch has yet to become a reality.

Fatal accidents, missed deadlines, and the impact on billions of jobs have tapped the brakes on the self-driving holy grail for now.

But with city streets already congested, autonomous innovation is finding a role in public transport.

Self-driving buses have already entered operation in some parts of the world, as have driverless trams.

For a legal safety net, there's still often someone in the driver's seat, ready to take over if complex hazards emerge.

But if proven safe, that too could change in time.

The journey from electric to autonomous vehicles hints at a future where driving is reimagined, a seamless blend of technology, sustainability, and autonomy, steering us towards a new era of transportation only thought possible in science fiction.

But as science fiction becomes science fact on our roads, the skies remain dominated by the sheer scale and reach of air travel.

There's no doubt the invention of the aeroplane shrank our world.

Suddenly, countries on the other side of the earth were accessible in a matter of hours rather than weeks or months.

Air travel in the 20th century facilitated the exchange of ideas and tradition.

People could experience different cultures firsthand.

The world saw its first dedicated passenger planes take to the sky during the 1920s, with airline carriers like KLM and Qantas beginning some of the first international flights.

But it wasn't until after the Second World War that passenger comfort became a priority with the advent of pressurised cabins.

Aircraft designs evolved at an astonishing pace, and by the 1950s, the world had truly entered the Jet Age.

But it's not just the planes in the sky that are transportation marvels.

Airports too are just as marvellous.

Sprawling hubs of global connectivity, airports stand as the epicentres of air travel, connecting millions of people daily with their domestic and international flights.

Airports have evolved from simple airstrips to mega-complexes that function as cities in their own right.

Once just a gateway to the skies, today's airports are vast hubs of activity, catering to millions of passengers with shops, services, and entertainment.

Their architecture is often grand, reflecting the global connections they facilitate.

With over 100,000 flights crossing the skies daily, airports move more than 9.4 billion passengers annually.

Behind the scenes, these logistical behemoths are intricately run machines.

Air traffic control towers coordinate the constant flow of planes, while ground crews manage everything from refuelling to baggage.

Security systems, brain power, and technology work in concert to ensure that flights depart on time and passengers move smoothly through terminals, although they can also be the bearer of bad news.

It takes countless people to keep airports running smoothly.

At Sydney's Kingsford Smith Airport alone, it takes 30,000 people to operate the mini-city.

As airports cater to modern travellers, there's a plane that regularly lands on their tarmacs that symbolises human ingenuity.

It's a marvel that revolutionised air travel, bringing the world closer together every time it takes off.

(lighthearted music) A half-hour drive from Seattle, Washington, is the world's largest factory by volume.

Conspicuous in size, the Everett Factory was erected in 1967 to assemble a plane that would take international air travel to an entire new level of affordability.

Pan Am and Qantas, both industry leaders, needed a solution to a simple matter of economics.

If their planes could take more passengers, the cost of a flight could be divided across more airfares, putting air travel within reach of more people.

(uplifting music) Built on the success of its 707 model, Boeing took on the challenge to increase passenger capacity 2.5 times over, seating passengers in rows of 10 in a more spacious cabin.

The result was a wide-body aircraft capable of long-haul flight.

(people clapping) The iconic 747, the world's first Jumbo Jet.

Recognisably different from its relatives with a hump-like crown, the 747 was built to accommodate an upper deck towards its front.

It was the result of 75,000 blueprints and 15,000 hours of wind tunnel testing.

The one-and-a-half thousand 747s produced by Boeing have collectively flown almost 80 billion kilometres, the equivalent of 10 round trips between the Sun and Pluto.

Christened the Queen of the Skies, the 747 dominated the global air industry, featuring in the fleets of more than 150 airlines.

Perhaps nowhere more clearly than the Australian flagship Qantas, for whom the 747 became the exclusive model, introducing flyers to a new premium concept: Business Class.

(upbeat music) It's considered a bedrock of aviation, endlessly customised and refitted for freight and military.

And it's the model of choice for Air Force One, the famous call sign of the American president's aircraft.

Though still in use around the world, the 747 has been largely superseded.

Smaller planes are now able to go the same distance, burning less fuel en route, while economic competition from more airlines has made less of a business case for a single, massive people-mover.

But to some, size still matters, and there's one aircraft that took it to even greater heights.

First flown in 2005, the Airbus is the only craft that's ever beaten the 747 in all measures of passenger capacity.

40% bigger, it typically holds around 550 passengers, with a theoretical limit of well over 800.

Every airline can tailor a jumbo's layout to their preference, but the A380 goes the extra mile, catering to luxury, offering more room for bars, showers, and lounges.

It's like a hotel at 30,000 feet.

Compared to Boeing's flagship model, the Airbus offered more seats, longer ranges, and improved interiors.

The ability to carry more passengers per flight also had the effect of reducing air traffic into some of the world's busiest airports.

But its lead in the game came almost four decades after the 747 first pioneered the jumbo, and the A380 has never quite eclipsed the popularity of its rival.

These days, more people are flying than ever, but airlines are under pressure to maximise occupancy.

Filling up every seat on a superjumbo is a gamble, but selling out a smaller plane with two engines can guarantee a return.

(gentle music) Airbus ceased production after just 16 years, before the pandemic wreaked havoc on the global aviation industry.

With little parking space for planes not in the air, the A380 became a conspicuous liability for many airlines, with many retiring or selling off some of their fleet.

While the A380 is still a true marvel of air travel, it was always an expensive plane to fly and maintain.

Because the harsh reality is, the future of transportation has to be about sustainability and efficiency.

(pensive music) (aeroplane whooshes) The future for our planes, trains, and automobiles looks green.

Electrification of planes is poised to redefine the skies.

Imagine planes whispering across the atmosphere, leaving behind the thunder of jet engines for the hum of electric motors.

This evolution promises quieter flights, reduced emissions, and a leap towards sustainable aviation.

As the world dreams of carbon-free skies, the electrification of aircraft stands as the next giant stride in the journey of air travel.

Back on the ground, the future of trains glides at unimaginable speeds, encased in sleek, airless tubes.

The Hyperloop represents the next chapter in railway innovation, a revolution of magnetic levitation and vacuum propulsion.

Zipping through tunnels at the speed of sound, passengers will experience the thrill of ultra-fast travel between cities.

This futuristic technology has the potential to transform long-distance travel, with unparalleled reduction in environmental impact.

Yet, as we charge forward, some darker shadows of electrification loom.

Lithium batteries, the lifeblood of electric cars, pose an environmental conundrum.

Lithium extraction scars the earth, while disposal remains a ticking time bomb.

These batteries have been known to explode, sending thick toxic smoke into the air, and are difficult to recycle.

As we electrify our future, we must also innovate ways to dispose of these volatile power sources responsibly.

But for now, we make do with the planes, trains, and automobiles to get us from A to B. From the soaring heights of the skies to the endless roads and railways that carve through landscapes, humanity's marvels of transportation reflect our unyielding desire to connect, explore, and innovate.

These feats of engineering carry us forward, bridging distances both physical and imagined, weaving a vast, intricate web that shrinks the world and expands our horizons.

(plane whooshes) (bright music) (bright music continues)