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

This artificial cave looks like something out of a fairytale.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

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

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

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

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

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

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.

A church of bones, decorated with 40,000 human skeletons.

Walk through Czech history in Prague's largest graveyard.

Macabre astrological automaton clock dating to the late 1400s.

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

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

A spooky spot along the road where things mysteriously seem to move uphill by themselves.

Home of the first female Hungarian poet, where her secret writing lay hidden for over a century.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

A Romanian church built from one single oak.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

Romania's only crater lake with water as pure as if distilled.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.