An abandoned saucer-shaped monument in the Bulgarian mountains.

A stunning 18th century pharmacy and medieval chemist's collection.

This bone-filled cave got its name after they found 140 bear skeletons inside.

This Romanian village may have been drowned, but it is long from forgotten.

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

No one knows who built this strange cave of worship or exactly why.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

An eccentric aristocrat brought these Australian natives to their current Scottish home.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

A pub that is literally in the middle of nowhere, but continues to do business.

Fifty years of contamination in Scotland's waters.

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

Built to hold the worst of the worst of the Nazi war prisoners.

A curious collection of mechanical moving figures.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

A slice of central Asia in the middle of Berlin.

A brush maker used his factory to protect blind Jews from the Gestapo.

A surreal museum of extraordinary industrial objects.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Where once there was a train station bathroom, there is now this German burger joint.

Shells collected from over a hundred different countries line the walls, floors and ceilings of this fantasy museum.

A fiery-red region of scooped out land still largely untouched by civilization, tourists or otherwise.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.