A tiled, multi-level garden of survival in Lyon.

Since ancient times these picturesque springs have been providing bathers with healing waters.

The site of the first medieval crusade that pitted Christians against Christians.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

A medieval church built into an ancient cave.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

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

One woman's decades-long obsession with the "La Fée Verte."

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

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

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

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

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

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

Two small chapels housed inside an ancient tree.

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

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

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

An icy lake tucked among jaw-dropping alpine panoramas.

Historic medieval fortified city in southwest France.

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

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

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

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.