Abandoned Freeway Stub on State Route 163

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

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

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.

When local government began removing public benches, the public pushed back, and vibrant, community-built seating now outnumbers the official shelters at Chattanooga bus stops.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

A "station to nowhere" marks the site of a Siberian subway project that never saw the light of day.

The highest rapid transit station in the world.