This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Three columns of volcanic rock shoot out of the ocean.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

This 600-year-old home seems to defy physics.

The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

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

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

An ancient knight and a symbol of the city's freedom.

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

This unique building in the main square stands out among the city's typically Baroque architecture.

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

Concrete strongholds stand guard over the Golden Gate.