The sunlight passing through the opening of this huge cave system creates a magical effect.

A forgotten "city of water" underneath the famous Trevi district.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

This medieval hilltop village was abandoned at the end of the 19th century, after existing for more than 500 years.

A beautifully well-preserved ancient Roman villa.

The mountaintop inspiration for Umberto Eco's "The Name of the Rose."

Gorgeous views of Italian mountains and valleys form the backdrop of this unique open-air theater.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The oldest botanical garden in the world that technically isn't the oldest.

The only museum with its curator—and her pets—buried inside.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

This church carved into the rocks is full of enchanting stone statues.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

This natural gas vent certainly earns its name as the smallest volcano in Italy.

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

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

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

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

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

Stumbling upon this whimsical wooded garden is like stepping into an enchanted forest full of philosophical musings.

This large, circular tomb is the final resting place of the first emperor of Rome.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.