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

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Super-heavy Nazi architectural experiment.

A fascinating insight into daily life in the Eastern Bloc.

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

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

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

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

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

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

A miraculous three-handed portrait of a saint can be found inside this church.

An abandoned masterpiece of Soviet Brutalist architecture.

This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

Berlin's old airport.

Floating swimming pool within a moored vessel.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

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

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

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

A wunderkammer of mysterious objects and stories.

A surreal museum of extraordinary industrial objects.

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

A slice of central Asia in the middle of Berlin.

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