Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

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

An Italian hillside ghost town.

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

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

One of seven Jewish catacombs in Rome and one of only two open to the public.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

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

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

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

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

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

The venerated body of a 12th century saint is celebrated each year with the 'Race of the Candles.'

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Church holding the preserved body of a levitating saint.

A dead saint, a deadly poison, and a mysterious holy ooze.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

The naturally mummified body of a peasant girl saint.

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

The Pope’s secret escape route.

Geothermal waterfalls in Tuscany.

If you want to talk to the Pope you will have to stare down this surreal vision of Jesus rising from a nuclear hell.