Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

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

A museum of magic with a Sadist past.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

This massive library holds what was once the largest book collection in the world.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The personal library of the founder of modern neurology is open to visitors.

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

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