The hidden lair of an alchemist rediscovered in a 2002 flood.

The first museum in the world devoted to sexual gadgetry.

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

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

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

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

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

An Orwellian sculpture with eyeball cameras watches passersby.

A bus with a butt and biceps to put Olympic athletes to shame.

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

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

This artificial cave looks like something out of a fairytale.

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

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

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

A mocking tribute to the past and modern leadership of Prague.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

An existential riddle in the world's largest ancient castle.

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

The rusted creatures wait to be discovered in Prague's botanical garden.

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

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