This hermitage celebrates the legend of Emperor Constantine's healing from leprosy.

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

A monk spent 14 years carving steps through tuff to make this religious site more accessible to pilgrims.

Magnificent frescoes decorate the interior of this Romanesque church, which also showcases an unusual phenomenon during winter solstice.

Nine caves filled with recently-discovered archaeological finds under the houses and the streets of the most ancient district of an old town.

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

Water and windows define this defensive Italian well.

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

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

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

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

Italian director Pier Paolo Pasolini fell in love with this lonely 13th-century tower while making his most famous film.

Was this cave created by Hercules's wrath, the devil, or volcanic activity?

A lonesome Moai stands in a small Italian town some 9,000 miles away from its Easter Island brethren.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

For centuries, this town's hot springs have been embraced by rich and poor—and even by Popes.

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

Largest necropolis in the Mediterranean.

A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

Rome's ancient Etruscan rival, now a park full of ruins.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.