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

Started as a kitchen garden, now the second largest botanical garden in the world.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Three courses accompanied by Christian rock.

The "Prussian Versailles" that is as glorious today as when it was built.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

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

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.

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

An eerie, derelict amusement park in Berlin.

Berlin's old airport.

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

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

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

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