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

The site where a plot to assassinate Hitler was planned—and its conspirators were executed—is now a powerful memorial to the German resistance during World War II.

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

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

Super-heavy Nazi architectural experiment.

A towering monument to war, located on a beautifully peaceful hill.

Berlin's old airport.

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

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

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

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

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

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

Reminders of the Battle of Berlin still scar the railway.

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

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

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

A century-old shot ball factory tower is open to the public once a year.

The final resting place of many of Germany's most famous communists.

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

A plaque on the side of a building is a small tribute to the woman who invented an iconic Berlin fast food.

A giant bug impaled on a 75-foot-tall needle.

The Belgian library displays burned books that were salvaged from the fires of both world wars.