Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

A submerged archeological park still holds the wonders of a Roman Sodom.

This former asylum for Black Americans is haunted by its history of violence and racism.

The only medieval bridge in Britain with its defensive tower still in tact.

Now abandoned, the world's first torpedo factory is crumbling into the sea.

In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

The ghostly remains of what was once the world's richest copper mine.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A haunting theme park is slowly being swallowed by the jungle.

The abandoned medieval theme park was meant to be the "Disneyland of the Philippines."

An eerie, derelict amusement park in Berlin.

This attraction was abandoned after the Chernobyl disaster.

Once the most densely populated place in the world, this island is now a ghost town.

The abandoned Japanese amusement park once loomed as a dystopian Disneyland.

The iconic castle that withstood a magnitude 6.2 earthquake has become a symbol of resilience.

This ruined Japanese stripclub sits half burnt to the ground.

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

A Japanese concept restaurant that feels like a party thrown by the monsters in your closet.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

On Japan's Tashirojima Island, cats are king.