Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

A sulfuric hellscape in southern Italy.

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

A special area of the National Archaeological Museum of Naples is located inside a metro station.

This medieval city gate is now a blend of the past and the modern world.

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

Before the more famous Royal Palace of Caserta, the king of Naples first commissioned this overlooked residence.

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

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

A sculpture serving as an homage to Pope John Paul II.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

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

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

A rare example of a medieval house in Rome adorned with a melancholic inscription.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

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

This is the oldest Roman-made bridge in the city still existing in its original state.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

An 18th-century post box used to alert the church of sick and ailing foreign pilgrims.