An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.

Water and windows define this defensive Italian well.

Geometry and mystery come together in an epic show of octagonal masonry.

Ham is serious business at the Prosciutto Museum-Serious, delicious business.

A sulfuric hellscape in southern Italy.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

The bomb-ravaged remains of of a colossal Neptune.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

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

This winding road through an Italian canyon may be the most scenic drive in the world.

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

One of the largest caves in the world open to the public.

Romans built the world's tallest artificial waterfall in 271 BC.

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

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

This Italian foot path winds through the mountains via 52 individual tunnels.

This delightful little museum is dedicated to only one thing: pasta.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

The Pope’s secret escape route.

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

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