A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

The mummified relic of St. Catherine sits forever on a golden throne.

Gods clash with machines in a power plant regenerated as a museum.

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

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

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

A sulfuric hellscape in southern Italy.

Southern Italy's spinning top village.

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

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

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

Europe’s oldest natural human mummy.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

Erotic art covers the walls of the largest ancient pleasure palace.

The Pope’s secret escape route.

The bomb-ravaged remains of of a colossal Neptune.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

Ancient snack bar of the Roman Empire re-opened.

Italian cave with exceptional acoustics and an unsavory history.

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.