The Golden Gate Bridge was built in 1937. How much longer will it last?

The bridge uses massive steel cables and a steel roadway. Today, engineers would use lighter polymers.

Still, the Golden Gate Bridge is extremely strong. It's also maintained continuously.

Keeping the bridge painted and repaired costs $85 million per year.

The bridge is also underdoing a $400 million seismic upgrade, since it's right on a faultline!

With these upgrades, the Golden Gate Bridge could easily stand for another 80-100 years

Swipe up to learn more about the bridge's future--and the risks facing it today.