A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

A private garden of sculptural eccentricities.

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

For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

Grottoes, sculptures, and recycled ceramics permeate what was once just a small farm in France.

100-windowed castle turned art gallery, built by one dedicated mason.

Limestone grottoes turns everyday objects into stone.

An unsettling shrine dedicated to the ravenous beast that prowled 18th-century France.

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

The fantastic architectural models of a French traveler.

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

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

An ancient monastery, a locked room, and a mysterious book heist.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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