A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

The hallucinogenic center of the ancient world.

A spectacular cave and a beguiling lake.

Monasteries on rock pillars, once accessible only by frayed ropes.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

This banal Parisian entranceway is not what it seems.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

Got apples?

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This Parisian café sticks almost exclusively to an ethos of reuse.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

A small world of mechanical magic and metal merry-go-rounds in a Outsider art Museum.

One of the last realized projects of an influential, self-taught, French Modernist architect Jacques Couëlle.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

An often-shuddersome journey into a low-tech, robotic themepark.