An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

Pompeii's less famous neighbor is still revealing her secrets.

The final resting place of the poets Shelley and Keats.

Medieval torture techniques with a modern conscience.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

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

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

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

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

Eighteen mummies have stood guard behind the altar of this tiny church since 1833.

A sulfuric hellscape in southern Italy.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

A submerged archeological park still holds the wonders of a Roman Sodom.

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Geothermal waterfalls in Tuscany.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

A preserved dragon's rib that remembers the legend of the founding of the city of Atessa.

An Italian vineyard invites religious pilgrims to stop by 24/7 to get their drink on, for free.

Host to the annual Festival of the Snakes.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

A 16th-century horror show built in a lovely Italian garden.