Once an ancient Roman bath, now a hotbed of geothermal energy and a hub for energetic innovations.

An island on the Venetian Lagoon hosts this stone chair that has nothing to do with the King of the Huns.

This medieval castle was home to a known tyrant and features several hidden passages.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

Things seem to roll, flow and run uphill on this short patch of road near Ariccia, Italy.

Hidden in a high mountain cave, this hermitage dates back to the ninth century.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Hidden within this iconic mountain are a set of World War II bunkers once used by German forces.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

The Emperor Tiberius' palace of debauchery.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

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

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

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

The mystic whose incorrupt corpse still attracts the faithful.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

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