Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

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

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

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

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

Floating swimming pool within a moored vessel.

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

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

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

Berlin's old airport.

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

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

A museum dedicated to a Cold War era sausage.

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

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.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.