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

An Orwellian sculpture with eyeball cameras watches passersby.

Enormous sandstone towers loom within a Czech forest.

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

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

This network of conjoined cellars was riddled with traps and supposedly allowed the townspeople to pretend their homes were deserted.

Tall columns of volcanic basalt make up this improbable-seeming rock formation.

This Gothic church was wheeled in its entirety to a new location a half a mile away.

Before building her own tombstone, an untrained artist created a concrete menagerie in her garden.

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

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

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

Walk through Czech history in Prague's largest graveyard.

A Jenga-style cylindrical tower of books that appears to go on forever.

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

A former squatter's paradise outside Prague.

A crucified and bearded female saint.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

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

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

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

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