A prehistoric route that has claimed many victims is now closed to traffic.

If you ever wanted to touch a medieval mercenary’s three testicles, look no further.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

A brutalist gem towering over the heart of Milan.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

A massive mausoleum towers over the gravestones in a 19th-century Italian "model village."

This former fascist summer camp was abandoned for decades.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

The medieval woodcut-style artwork chronicles life in medieval London.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

This sprawling scenic burial ground is the final resting place of Japan's last shogun.

A 20-meter (65-foot) robot towers over Tokyo Bay.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

Peace Park and the Atomic Bomb Dome.

Japanese national treasure originally built in 593 CE.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.