Engineering

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

Once housed in the towers of this Gothic church, this 17th century clock still ticks today.

At nearly 1,000 feet long, this astonishing glass suspension bridge is one of the longest in the world.

One of the largest mechanical models of the solar system in the world.

A humble homemade ride attracts visitors from around the globe to this small Midwestern town.

An engineering masterpiece, or “Scheme of Madness?”

Humboldt's human-powered sculptures race across land and sea for days on end in a wacky quest for dominance.

Check out engineering marvels of the past at this unintentionally retrofuturist museum.

A rotating bridge that carries a little canal over a larger one.

This conical hill was built as a testing ground for an engineer known as the Glider King.

This beautiful system of tunnels built into natural rock serves as a centuries old plumbing system.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

Because sometimes the most efficient route from A to B isn't a straight line.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”