This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A unique waterfall that some believe attracts the fairfolk.

The fairy tale castle of the "fairy-tale king."

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

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

Thousands of well-dressed mummies below a monastery.

An ancient ossuary in Rouen.

Two small chapels housed inside an ancient tree.

This collection of lurid religious statues tell the tales of a saint who stood down the devil.

An extraordinary collection of 18th century anatomical waxworks.

An amazing collection of wax anatomical models and terratological models.

This subterranean necropolis holds three floors of antler-dug grave caves.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

For hundreds of years, this huge figure has been blessing visitors before they explore his body.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Jesus' footprints and the first catacombs in the world.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."