The home of the morbid art of corpse plastination is open for visitors to view the fascinating, but stomach-churning process.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The prototype for all Nazi concentration camps.

"The most colorful grottoes of the world.

An intricate and amazing house built by architect Karl Junker.

Terrifying derelict military hospital once housed a recuperating Hitler.

An unusual cave filled with rare alien-looking aragonite formations.

The Slovenian architect designed many landmarks in the capital city, including his own dream house.

A miniature train-ride through Slovenia's largest cave system.

This abandoned Slovenian military barracks has become a punky-political art squat.

This massive subterranean fissure is known as the "underground Grand Canyon."

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

This doorless 20th-century elevator doesn't stop or slow down.

These 17th-century mummies are no longer naturally preserved, but remain on display today.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

This artificial cave looks like something out of a fairytale.

A saintly relic hidden in a Prague church basement.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

What looks like a suicide in progress is actually a statue of Sigmund Freud.