Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Time stands still at this serene burial ground in the center of Budapest.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

The video game-themed street art first popped up in the French city.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

Oldest Museum of the Netherlands is a true cabinet of curiosities.

One of Jeff Koons’s largest sculptures and his first commemorative work.

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

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

A series of playful yellow penguins share a serious message about the environment.

The first museum in the world devoted to sexual gadgetry.

Monument to a suicide protesting the Soviet invasion.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Watch cheese-flipping robots in action at this factory and museum.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.