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

Explore the complex ecology of this multifaceted nature preserve by riverboat.

A steam powered train that runs on city streets.

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

An old department store turned Nazi prison turned artist commune.

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

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

This classic restaurant features a gorgeous mirror-clad room.

Berlin's old airport.

Super-heavy Nazi architectural experiment.

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

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

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

A restaurant and observation deck built in a unique broadcasting antenna.

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

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

The fairy tale castle of the "fairy-tale king."

Swiss vineyards in a UNESCO heritage site.

This one has sailed five times as far as Sir Francis Drake's famous ship.

An unusual round church in London with a Templar past.

Hear the quietest sound from across the dome.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The famous winding walk at Chartres is surrounded in mystery and myth.

Unconventional site where the tracks of Zurich tramcars intersect.