An eerie, derelict amusement park in Berlin.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

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

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

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

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

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

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

Tiny memorials honor individual victims of the Holocaust.

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

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

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

A steam powered train that runs on city streets.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

A section of destroyed vertical lift bridge stands alone in the Peene river.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

An elevator into the Baltic Sea.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

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

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

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.