The latter half of the 19th century saw the "golden age" of the American cowboy; newly-built railroad lines made it easier to transport cattle from the western plains to the east coast, where they could fetch top dollar. As these photos reveal, a cowboy's life was a hard one, but living freely on America's western frontier nevertheless appealed to thousands of men.
These photos were taken across the American West between the late 1800s and the early 1900s.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
The true story behind the most romanticized, infamous outlaw couple in U.S. history and their gang.
The world famous escape artist could escape from everything - except his own mortality.
Brothers Wilbur and Orville Wright built a flying machine that made its first flight in Kitty Hawk, North Carolina in 1903.
During World War II, more than a thousand women signed up to fly with the U.S. military as WASPS.
The six-part story of a frontiersman farmer and a wealthy Confederate slave-owner's daughter.
A revealing portrait of one of America's most paradoxical leaders.
John Wesley Powell's epic journey into the unknown Grand Canyon was filled with adventure as his team mapped the Colorado River for the first time.