During World War II, this rice mill became a Nazi concentration camp.

The steel cable lets adventurers zoom between two mountain towns at speeds of up to 75 miles per hour.

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

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

A once-luxurious, now abandoned hotel in the Italian Alps.

Italian cave with exceptional acoustics and an unsavory history.

This half-finished "city of toys" was almost Italy's own Las Vegas.

A sunken idol welcomes parishioners to Davy Jones' Locker.

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

An Italian hillside ghost town.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Pompeii's less famous neighbor is still revealing her secrets.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A submerged archeological park still holds the wonders of a Roman Sodom.

The middle finger of modernity.

This ancient market is often referred to as the oldest shopping mall in the world.

This curious, round temple is the oldest still-standing marble building in Rome.

An alchemist's "magic door" stands in the middle of a Roman park.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

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