The sacristy of this church contains remains and relics of members of the Aragonese royal family.

The relics of dozens of martyrs are stored in a single chapel.

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

Suffocating dogs was a common spectacle in the fumes of this noxious cave.

An unusual "skull with ears" sits in the crypt of this small church tucked away at the end of a narrow alley.

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

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

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

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

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

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

The mysterious remains of a martyred teenage saint are venerated inside a small country chapel.

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

This Bronze Age man spent millennia buried in a mine, giving his bones an eerie hue.

It's believed these prehistoric individuals were the victims of cannibalism.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Longest fortress system anywhere in Europe.