The last remnants of a massive medieval wall that once encompassed the city of Berlin.

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

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

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

Floating swimming pool within a moored vessel.

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

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

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

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

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Art and a pun, all in one.

An eerie, derelict amusement park in Berlin.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

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

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

This painted Lego bridge is the product of over a century of locomotive history.

The monumental home of Prussia’s eccentric "Cannon King."

The world's biggest pet store.

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.