Italy's curious field of mud volcanoes is named for being both gross AND salty.

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

The origins of a large, medieval castle are shrouded in mystery, but now it's a delightful garden.

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

An abandoned village, frozen in time by the threat of a landslide.

Famous landmarks and structures from across Italy fill this miniature park.

A striped 12th-century basilica sits in the countryside of Sardinia.

This Torino museum honors a soldier who kept the city safe using barrels of exploding gunpowder, losing his life in the process.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

A 2,000-year-old engineering wonder hides beneath an Italian town.

A massive mausoleum towers over the gravestones in a 19th-century Italian "model village."

This cliff-face port is considered a masterpiece of mining engineering.

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

A map of Italy made entirely of trees.

These pools have been abandoned for over 20 years.

A fascist-era rural village abandoned since the early 1980s.

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

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

The wreckage of a tragic plane crash is on display at this museum devoted to a famous Italian conspiracy.

The now-abandoned Fascist summer colony served a dark purpose during World War II.

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

The world's largest bamboo labyrinth is a living demonstration of the plant’s immense potential.

Ride a boat through this magnificent underground world, which now doubles as a theater.

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