The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

Haunting graffiti left by prisoners of the Spanish Inquisition.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

The Emperor Tiberius' palace of debauchery.

Cave shrine on Monte Pellegrino.

Every inch of this chapel is covered in craftsmanship from across 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.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

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

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

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

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.

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

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.