A beautifully well-preserved ancient Roman villa.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A limestone grotto where daylight filters in from below and turns the water a beautiful turquoise. Also home to a small underwater nativity scene.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

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

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

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

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

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

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

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

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

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

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

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

The final resting place of the poets Shelley and Keats.

A freedman baker’s lavish tomb has a relief showing various stages of Roman bread making.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

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

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

Architectureal fantasy quarter of Rome.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.