Infrastructure

A Roman water tunnel still flows 2,000 years on.

A river hides a charming medieval bridge.

An unexpected public exhibit showcases the diversity of Dutch street posts.

On the outside of the Mersey Tunnels, an Art Deco sculpture of an Egyptian Pharaoh wears goggles and racing gear.

Water still flows through the oldest Spanish aqueduct in America.

This California town keeps a graveyard of its retired, decorated fire hydrants.

Construction of this bridge was once described as an "act of violence" against a neighboring country.

Unrefined, uneven, and unstable—this is the real McCoy of Pakistani suspension bridges.

This rural bridge gave the government of West Virginia a red scare.

In the 16th century, a Franciscan monk pulled off a construction miracle by building a Roman-style aqueduct to save the town of Otumba, Mexico, from certain death.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

The ruins of a failed dam that was built over land later described as a "sponge."

One of London's lost rivers runs through a pipe over the tracks of this subway station.

The largest Spanish artifact built in the Philippines and one of the oldest underground reservoirs in the world.

Where the people of Gozo have been doing laundry for more than six centuries.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.