A museum dedicated to a Cold War era sausage.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

This TV tower once secretly housed a GDR intelligence team.

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

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

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

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

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

An abandoned swimming pool decays on the outskirts of Berlin.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

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

Super-heavy Nazi architectural experiment.

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

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

A fascinating insight into daily life in the Eastern Bloc.

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

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

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

An eerie, derelict amusement park in Berlin.

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