These medieval skyscrapers dominate the skyline of this small Tuscan town.

The bomb-ravaged remains of of a colossal Neptune.

These delicate sand pyramids look like naturally occurring gothic spires.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

A once-luxurious, now abandoned hotel in the Italian Alps.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

Art and armour fill every inch of this rich kid's Italian villa.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This half-finished "city of toys" was almost Italy's own Las Vegas.

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

Italian cave with exceptional acoustics and an unsavory history.

A lover's walk between hilltop towns, decorated with graffiti love notes.

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

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

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

Ancient ruins hidden underneath a modern luxury hotel.

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

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

Virgil's many-mouthed gateway to the underworld.

This is the oldest Roman-made bridge in the city still existing in its original state.