An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

A haunting collection of the vanished and disappearing natural world.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Paris' fabled purveyor of exotic taxidermy and natural history curios.