This knockout museum lies in a sleepy corner of London.

This London marker celebrates the spot where the world-famous English band was founded.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

The post-apocalyptic remnants of a bucolic town ruined by a plane crash.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

An unusual number plate signifies the building's saucy past.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

The celebrated eyesore created by starry-eyed sweethearts.

Statue of death tucked in the University of Medicine courtyard.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

The narrowest street in Paris.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.