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

Beautiful carved tunnels.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

These quaint French houses dangle precariously over a precipice.

The fantastic architectural models of a French traveler.

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

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

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

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

The famous winding walk at Chartres is surrounded in mystery and myth.

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

BDSM, 1930s Style.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

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

This museum in a Paris apartment gives a unique look at the iconic French singer's life.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

This banal Parisian entranceway is not what it seems.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

This massive blockhead sculpture hides an entire library.

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

Historic medieval fortified city in southwest France.

The largest underground church in Europe.