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

Southern Italy's spinning top village.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

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

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

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Bell tower juts out from a village buried under a lake.

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

Italian cave with exceptional acoustics and an unsavory history.

This magical-looking island is notorious for the misfortunes suffered by its owners.

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

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

Venice's island of the dead.

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

The world's most active stratovolcano is almost always erupting.

An ancient artistic garden parlor full of hidden water wonders.

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

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

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

This abandoned Brutalist treehouse is a hidden architectural relic.

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

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

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.