Floating swimming pool within a moored vessel.

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

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

A 12th-century fortress containing some of Berlin's oldest buildings.

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

A scattered trail of street art adds a pop of color to the city's stark structures.

A sulfuric martian landscape that looks far better than it smells.

This stunning concert hall has become a symbol of Iceland's national recovery.

This beautiful, historic church looks like something out of a simpler past.

The rogue roots are gradually consuming some of the historic marble grave markers.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Two stone columns flank the grand Venice square, but there were supposed to be three.

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

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

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

A fascinating insight into daily life in the Eastern Bloc.

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

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

The footprint of a frustrated devil in Munich's Cathedral.

Tiny memorials honor individual victims of the Holocaust.

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