Interactive: Balancing Forces

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Since 1937, the Golden Gate Bridge has stood through high winds, strong water currents, heavy traffic loads, and earthquake tremors. How did engineers design it to be structurally sound?

In a word: mathematics.

Here's your chance to explore a few suspension bridge building principles. Test engineering concepts, see their intricate math, and learn how they play out on the bridge today.

My American Experience

My American Experience photos

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From the Empire State Buiding to the carvings on Mount Rushmore, the Golden Gate Bridge, and the Space Needle, the U.S. has dozens of impressive, important, and iconic structures. Which ones have you been to? Which has had the biggest impact?