A haunting medieval mural of the Danse Macabre graces the walls of this church.

The haunting cadaver tomb of a famous French poet, playwright, and filmmaker.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

The bizarre home and sculpture garden of an eccentric artist.

The beautiful bas-relief lines a sliver of a 19th-century walking path between two charming French villages.

A quarry cum sculpture park where the works of art are chiseled into the very walls.

Medieval Danse Macabre Fresco in Northern Brittany.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Natural mummies hidden in the crypt of a medieval French church.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.

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

The encased skull that is widely believed to belong to St. John the Baptist.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

Nicknamed the "Museum of Horrors," this French anatomical collection has been fascinating visitors for over a century.

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

A self-built mosaic house and sculpture park.

An enchanting work of outsider art, full of whimsical sculptures and carvings.

A series of haunting wooden totems are hidden in the woods surrounding a German environmental center.

This enchanting mountain plateau celebrates spooky local folklore.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.