The fantastic architectural models of a French traveler.

These quaint French houses dangle precariously over a precipice.

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

Avant garde house of Pierre Cardin on the Cote d’Azur.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

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.

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

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.

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

An icy lake tucked among jaw-dropping alpine panoramas.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

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

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

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

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

A surrealist timepiece by the artist of melting clocks.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

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

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

Notorious artist squat renovated into legal studios.

Abandoned railway line circling the city of Paris.