This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

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

An old department store turned Nazi prison turned artist commune.

Tiny memorials honor individual victims of the Holocaust.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

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

A monument to the man who almost killed Hitler.

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

This monumental work of art symbolizes the coming together of a previously divided city.

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

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

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

Super-heavy Nazi architectural experiment.

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

The non-native bovine herd was brought in to help conserve these Berlin wetlands.

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

Metro station with a claim to rock n' roll fame.

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

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

When German-Iraqi relations broke down, this embassy was vacated post haste.

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

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