This building’s ghostly exterior reflects its former lives as a prison, school, and funeral home.

The storefront of a ramshackle Parisian puppet theater.

One architect's organic, human-centric design has been fully realized in this alien art house.

An atmospheric, medieval-themed book store hides in a 13th-century underground space.

A village of art and exotic creations.

Jean Tinguely's bizarre monster sculpture is hidden deep in a forest.

One man's desire to transcend art led to the construction of this outsider chapel.

An art world insider finds himself battling for his artistic home.

The final resting place of the "father of special effects."

The post-apocalyptic remnants of a bucolic town ruined by a plane crash.

The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

This collection of French root art looks like an indoor fairy wonderland.

A self-built mosaic house and sculpture park.

Two small chapels housed inside an ancient tree.

Beautiful carved tunnels.

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

Monsters and miniatures are held in equal esteem at this wondrous museum.

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.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.