The largest underground church in Europe.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

Do these monsters look familiar? The gargoyles on this church are all from pop culture.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

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

Science fiction's grandfather has a fittingly marvelous tomb.

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

Ancient paintings known as the "Sistine Chapel of Cave Art."

One of the greatest maze designer’s greatest mazes.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

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

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

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

A charming flea market shop dedicated to retrofuturistic apparati.

An antique curios dealer and hybrid taxidermist.

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

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

The tomb of history's greatest potato promoter is surrounded by tubers.

A Parisian boutique devoted to la Sape, the elegant Congolese fashion subculture rooted in European colonization.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

Collection of antique taxidermy and natural specimens, near one of Paris's oldest flea markets.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.