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

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

A slice of central Asia in the middle of Berlin.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

The "Prussian Versailles" that is as glorious today as when it was built.

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

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

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

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

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

One of the world's heaviest musical instruments towers within a popular urban park.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

This conical hill was built as a testing ground for an engineer known as the Glider King.

Berlin's old airport.

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

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

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

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

This classic restaurant features a gorgeous mirror-clad room.

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

A terrific purveyor of natural history objects and curios.

Try not to get slimed in Tribeca.