This 18th-century sundial was designed to calculate the date of Easter each year.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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

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

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

The famous winding walk at Chartres is surrounded in mystery and myth.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

The hidden lair of an alchemist rediscovered in a 2002 flood.

An existential riddle in the world's largest ancient castle.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A surreal statue honoring Prague's favorite literary son.

This spooky statue sits outside a famous Prague theater.

The first museum in the world devoted to sexual gadgetry.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

A mocking tribute to the past and modern leadership of Prague.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

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

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

This automated sculpture of two men peeing will spell out text messages with their micturition.