Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

A Gothic cathedral created from volcanic rocks.

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

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

An icy lake tucked among jaw-dropping alpine panoramas.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

The curious underground history of keeping Paris clean.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

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

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

This small red school was where Germany signed their surrender during WWII.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

A curious collection of locks and keys.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

An antique curios dealer and hybrid taxidermist.