A church filled with the bones of hundreds of virgins martyrs—or so they say.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

"The most colorful grottoes of the world.

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

An intricate and amazing house built by architect Karl Junker.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

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

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Ruins of a German Castle on top of a towering stone pillar.

The most visited, and possibly most controversial, museum in Germany.

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

Started as a kitchen garden, now the second largest botanical garden in the world.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

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

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Ruins of a late 1950s Polish ski jump ramp in the middle of the city.

The giant metal fruit was once the symbol of a large farm.

This mushroom-shaped rock has frustrated and fascinated locals for centuries.