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

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

This banal Parisian entranceway is not what it seems.

The fantastic architectural models of a French traveler.

Ghosts of France's colonial past.

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

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

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

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

A beautiful and classically designed villa, with an hourly infestation of monsters.

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

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

This little-known relic crypt holds stolen parts of a Roman Empress.

A public park off the beaten path with a beautiful waterfall and 13th century Cistercian abbey.

Sleep in a climate-controlled plastic bubble for the night.

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

An aluminum skeleton brings Chinese mythology to the French shore.

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

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

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

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

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