This historic stone bridge has an entire neighborhood clinging to its sides.

Living trees form the structure of an open-air palace.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This "floating railway" is one of the world's oldest monorail systems.

"The most colorful grottoes of the world.

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

When the rain falls, this drain system turns into a musical instrument.

An intricate and amazing house built by architect Karl Junker.

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

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

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.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

A fascinating insight into daily life in the Eastern Bloc.

A striking 12th-century-style castle built on the edge of a cliff.

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

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

Art and a pun, all in one.

A wunderkammer of mysterious objects and stories.

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.

This classic restaurant features a gorgeous mirror-clad room.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.