The ruins of a rural church and a statue of Archangel Gabriel are tucked away in Majella National Park.

A burial vault located under Tiber Island in the middle of the Italian capital.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

The 16th-century son of Sienese nobility carved this hermitage out of volcanic rock.

This crescent-shaped beach is said to glow under the light of a full moon.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

This small hermitage is located along an ancient route that connected the Tiber and Rieti valleys.

This network of roads is one of the most unique Etruscan creations ever discovered.

Statues portraying anatomical deformities were placed in this garden to foster ethical behavior.

Wandering this ancient burial place offers a glimpse of the afterlife in the fresco-adorned tombs of an ancient Etruscan civilization.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

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

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Virgil's many-mouthed gateway to the underworld.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

A sunken idol welcomes parishioners to Davy Jones' Locker.

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

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.