Daily jousts and dancing barrel makers in Munich's mechanical clock.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

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

Tiny memorials honor individual victims of the Holocaust.

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

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

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

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.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An eerie, derelict amusement park in Berlin.

A mysterious shape catches the eye in this 16th-century painting.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Eighty million natural history specimens call this gargantuan museum home.

Light still pours into the ruins of this ancient Islamic observatory.

Home to what was once considered the largest gate in central Asia.

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

This museum is dedicated to one of Russia's greatest explorers.

These oldest of these "embroidered stones" were carved 4,000 years ago in a high mountain valley.