It's always summer at the beach inside this former airship hangar.

A unique, free-floating electric ferry may be the only of its kind in Europe.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

Terrifying derelict military hospital once housed a recuperating Hitler.

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

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A quaint Russian village in the middle of a German metropolis.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

An eerie, derelict amusement park in Berlin.

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

A restaurant and observation deck built in a unique broadcasting antenna.

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

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

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

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

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

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

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

Art and a pun, all in one.

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

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

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