An eerie, little-known Neapolitan museum filled with preserved human remains.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

This magical-looking island is notorious for the misfortunes suffered by its owners.

A sulfuric hellscape in southern Italy.

A beautiful but toxic fountain of mercury.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

Some of the smallest works of art in existence.

This 7,000-year-old megalithic wonder covered by a Franco-era reservoir emerges in times of drought.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

This small chapel is built of human bones and decorated with a golden skeleton.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

A complimentary beverage is offered to the bodega's resident rodents every day.

This gruesome biblical parade celebrates the one day a year that a bit of Jesus' blood turns to liquid.

Christ's blood preserved in a Belgian town.