A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

This unique Renaissance castle was turned into a home for Nazi occultism.

Floating swimming pool within a moored vessel.

This "floating railway" is one of the world's oldest monorail systems.

A striking 12th-century-style castle built on the edge of a cliff.

Art and a pun, all in one.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

This Communist-era residential block is one of the longest residential building in Europe.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

These rare statues are one of the few remaining material witnesses to Old Prussian culture.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

A saintly relic hidden in a Prague church basement.

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

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

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

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

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

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

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

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

The largest manmade caves in Europe now function as a motorbike club's headquarters.