This spooky statue sits outside a famous Prague theater.

A giant interactive periodic table with real samples of the elements.

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

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

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

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

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

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

Macabre astrological automaton clock dating to the late 1400s.

A tiny, intricate model railway system.

An old tram depot transformed into a vintage car paradise.

Opulent period costumes and murals lead you on a journey through fashion history.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

The only remaining U-boat that is still floating never actually saw any action in World War II.

This German "living museum" is maybe a bit too immersive.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

The only microgravity tower in Europe can produce nine seconds of weightlessness.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

This East German military command bunker was ready for World War III.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

Shimmering sea-colored mosaics and Jesus statues cover this opulent building.

The first (but not only) upside-down house in Germany.