This nightmarish children's plaything was left grotesque to help kids conquer their fear.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

Ancient rock-hewn town that witnessed key events of Georgian history.

Azerbaijani ghost town, decaying after a war left it an armed forces buffer zone.

This attraction was abandoned after the Chernobyl disaster.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

A former hen house turned curiosity cabinet displays one man's lifelong fascination with cannibalism.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

Dark, eerie exhibits make for a surreal exploration of the subconscious.

Siberian ghost town built by gulag prisoners.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This abandoned five-star hotel is now a five-star urban exploration destination.

A haunting deserted hotel is a favorite with artists and photographers.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

The painter of "The Scream" is laid to rest under a stoic bust of himself in the humble corner of an Oslo cemetery.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

Museum preserving torture methods from the past.

A centuries-old forgotten underworld lies beneath Malta.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Ever-growing collection of devils in art.