An art-filled botanical garden and former dyeworks hiding in plain sight.

A charming little museum founded by the designer of the Statue of Liberty.

This museum preserves over-the-top masterpieces that once qualified artisans for membership into a medieval guild.

A sanctuary for wolves in a community which once trembled in fear of the murderous "Beast of Gévaudan."

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

The Church of the Annunciation was carved into the face of a cliff, just like the rest of the town of Haute-Isle.

This collection of French root art looks like an indoor fairy wonderland.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

A chapel on a volcanic core, marking the end of a successful journey.

A self-built mosaic house and sculpture park.

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

Located in the house where Gustave Flaubert was born, this odd museum has more to do with medical grotesquery than the Western novel.

Two small chapels housed inside an ancient tree.

Beautiful carved tunnels.

These quaint French houses dangle precariously over a precipice.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

This professional clown's home is an outsider art wonderland.

The fantastic architectural models of a French traveler.

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

An aluminum skeleton brings Chinese mythology to the French shore.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.