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.

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

This national park is home to unique vegetation known as woodland savannah.

According to one story, this burial mound is made up of stones that represent the casualties of a major battle.

This secret coastal village is studded with pastel-colored houses all piled on top of one another.

Avoid gangster interaction while window-shopping.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A room in New York City that contains 250 cubic yards of dirt.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.