A kaleidoscopic warehouse-maze of handmade neon signs.

At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

This unique structure allowed boats to bypass underwater mine barriers in the channel to enter the harbor.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

One of the best-preserved wooden manor houses in Latvia, decorated with painted interior walls.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

One of the oldest lighthouses in the world has been in continuous use since it was first built in 1531.

This house is adorned with a serenade macabre from the Counter-Reformation period.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

An iconic Soviet statue of working-class people.

An enormous Soviet aircraft, the only one of its kind, stands at the deserted shore of the Caspian Sea.

This decaying complex from the early 1900s was once the site of massive iron and fluorite mines.

An acoustic anomaly with a mysterious cause.

Vines grow up the metal bars in this public park created from an old machine factory.

Visible at low tide, this rusting vessel is one of the last surviving examples of the X-Class "Midget" submarines.

This mural condenses 96 miles of one of Scotland's best-known trails into a unique art display.

The remains of an anti-aircraft battery from World War II look out over Glasgow.

Vibrant paintings stretch across 600 feet of derelict railway.

The abandoned transportation hub hides within the Glasgow attraction it once served.

A scattered trail of street art adds a pop of color to the city's stark structures.

Built to transport German U-boats through the never-completed Masurian Canal, the locks near this Polish village are now home to a rope course.

A rare, flower-shaped example of Brutalist architecture in Switzerland.