Cave shrine on Monte Pellegrino.

Explore the quarry where the marble was sourced for Michaelangelo's David.

A fascinating assortment of cave dwellings, medieval ruins, and sarcophagi are being devoured by the forest.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

Largest necropolis in the Mediterranean.

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

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

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

Vast network of air raid tunnels beneath Lombardy's capital.

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

Artist Diego Morlin's war between the natural and human worlds is a wanderer's delight.

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

Ride a boat through this magnificent underground world, which now doubles as a theater.

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

The top of society once luxuriated in this world-class hotel, which continues to impress, even in ruin.

A madman's personal garden filled with 1,000 sculpted heads.

Crumbling ruins of the thermal baths that once attracted royals and aristocrats from throughout Europe.

This precariously perched fortress was once ruled by a crow-worshipping baron.

A sulfuric hellscape in southern Italy.

An extraordinary collection of 18th century anatomical waxworks.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

These delicate sand pyramids look like naturally occurring gothic spires.

The mummified relic of St. Antoninus.

The secret medieval communication system will whisk your words above the noise of the crowd.