This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Italy's only urban waterfall has enchanted artists and travelers for centuries.

This caldera was once associated with the Etruscan god of the underworld.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

Templar knights fleeing persecution are said to have left this sword in stone as a landmark in 1307.

This lesser-known leaning tower is all that remains of the medieval castle of Vernazzano.

The ruins of this temple were later chosen by Pope Celestine V to found an abbey and a hermitage.

A fairy-tale-like forest that was sacred to Jupiter and Saint Anthony.

The eerie ruins of this feudal fortress witnessed the execution of 60 conspirators in 1387.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

In Majella National Park, these stone dwellings harken back to the region's pastoral history.

This iconic rock hermitage was once the abode of a future pope.

A study of Fascist era Art Deco design in Italy.

Unscathed for almost 2,000 years, the best preserved Roman triumphal arch is in a small southern Italian city.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The oldest volcanology research center in the world.

The first Italian factory to produce locomotives is now a marvelous museum.

According to the legend, this structure was built in a single night with the help of the devil.

Constructed during the 1960s, this bridge is still the highest in Italy.

This ancient walled garden turns fog into food.

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

An abandoned shopping gallery built during Fascist Italy tucked in the center of Palermo.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.