This historic fountain is a favorite neighborhood meeting point.

This grand gate once marked the entrance to a military barracks.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

This postmodern apartment block was designed to be a vertical neighborhood.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

An ancient Egyptian temple in the middle of Madrid, Spain.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

A museum dedicated to the mysterious cryptid.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

There's an exclusive Beefeaters pub hidden in the Tower of London.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Twisted buildings adorn the banks of the Rhine river.

This futuristic German television spire is actually the world's largest digital clock.

A rather vulgar example of the transition from Latin to the Italian vernacular.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

In the fictional world of Kcymaerxthaere, standing at this site just outside Vienna, Austria, the sky would have been found beneath your feet.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.