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

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

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

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

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

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

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

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

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

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

These delicate sand pyramids look like naturally occurring gothic spires.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

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

What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.

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

Beautiful views and Roman-style statues on the Italian coast.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

A submerged archeological park still holds the wonders of a Roman Sodom.

Five candy-colored villages on the Italian Riviera.

A beautifully well-preserved ancient Roman villa.

Take a giant yellow bird cage to the top of Elba's highest mountain.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

An Italian vineyard invites religious pilgrims to stop by 24/7 to get their drink on, for free.