Fittingly, America's museum of architecture is itself a magnificently designed old building.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

This grand gothic brewery has been pumping out suds for over a hundred years.

The site of the climactic scene from the classic horror film is now a historic landmark.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Reminders of the Battle of Berlin still scar the railway.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

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

Tiny memorials honor individual victims of the Holocaust.

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

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

Berlin's old airport.

Blitzkrieg bop your way through Berlin's Ramones Museum.

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

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

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

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

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.

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

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