World's largest collection of serial killer artwork and other macabre exhibits.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Time-frozen department store of dangerous and dusty relics.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

This hidden fortress has been coined the "City of Ghosts."

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.

One of the most valuable palace-garden complexes in the eastern borderlands—and one of the most haunted.

The ruins of an abandoned church loom within a picturesque Ukranian village.

When you've got to go, you've got to go.

This derelict superstructure was a very important warning system for the Soviet military.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

Ukraine's oldest operating pharmacy now offers guests a fascinating walk through apothecary history.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chernobyl disaster.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This underground transport hub doubles as an art gallery.

Copenhagen's celebrated theme park and gardens.

Located in the house where Gustave Flaubert was born, this odd museum has more to do with medical grotesquery than the Western novel.

The largest catacomb system in the world.

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

Gutted airplanes slowly decay in a Florida field.