This one-time health resort was used by aristocrats around the world.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This classic restaurant features a gorgeous mirror-clad room.

This sprawling Jewish cemetery is one of the largest in Europe.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Tiny memorials honor individual victims of the Holocaust.

Metro station with a claim to rock n' roll fame.

Cold war icon and onetime "hole" in the iron curtain.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

One of downtown Berlin's last reminders of its Communist past.

Berlin's old airport.

A restaurant and observation deck built in a unique broadcasting antenna.

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

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

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

An eerie, derelict amusement park in Berlin.

The celebrated eyesore created by starry-eyed sweethearts.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This Parisian gem is one of the most incredible ethnographic museums in the world.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

Former hunting lodge of a duke who was an avid collector of impressionist works.