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

A Swiss board game museum housed inside a picture-perfect castle.

Swiss vineyards in a UNESCO heritage site.

The university library shaped like a giant piece of Swiss cheese.

A constellation of golden cobblestones shows the names of local children born under a full moon.

Florentine Renaissance style building in Switzerland, home to the world's largest taxidermy Great White Shark.

Home of the Large Hadron Collider and the birthplace of the World Wide Web.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

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

A surreal museum of extraordinary industrial objects.

One of downtown Berlin's last reminders of its Communist past.

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

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

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

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

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