This cliff-face port is considered a masterpiece of mining engineering.

The Bourbon royal family had this unique octagonal hunting "cottage" built on a tiny islet in Lake Fusaro.

Things seem to roll, flow and run uphill on this short patch of road near Ariccia, Italy.

This ancient Roman arch misled treasure hunters for centuries.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

A map of Italy made entirely of trees.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

This serene, turquoise lake in an extraordinary nature reserve showcases a rare natural phenomenon.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

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

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

Italy's curious field of mud volcanoes is named for being both gross AND salty.

Abandoned village in Sicily built during the agricultural reforms of Mussolini.

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A semi-abandoned village destroyed by U.S. bombings during World War II dominates the valley of Turano.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

A 12th-century Italian skirmish gets reenacted with 500,000 pounds of flying citrus.

A beautiful discovery site of prehistoric burials.

A cherry tree growing atop a mulberry tree.