The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

This former quarry is now a picturesque gorge that hides a sunken lake.

This automated sculpture of two men peeing will spell out text messages with their micturition.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

A spiral staircase twists to the top of this unusual Czech lookout tower.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

Monument to a suicide protesting the Soviet invasion.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

Looming communist pillar with a Czech twist.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

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

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Walk through Czech history in Prague's largest graveyard.

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

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

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Countless grotesque faces stare out from this eerie Prague art wall.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

The first museum in the world devoted to sexual gadgetry.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.