This 16th-century monastery has been turned into a surrealist architecture compound.

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

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

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

The walls and streets of the ancient city are peppered with penises.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

Ancient ruins hidden underneath a modern luxury hotel.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

2300-year-old Roman road connecting the empire.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

Caligula's colossal pleasure ships, discovered by Mussolini only to be lost in flames.

The second-highest village in Lazio has attracted artists for 400 years and is now a spectacular open-air art gallery.

A town saturated in Italian rationalist architecture was once marshland drained by Mussolini.

A medieval Italian village is fighting depopulation with this vibrant annual street art festival.

A founding document of the European Union was written on an island where Roman emperors once banished women.

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

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

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