Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A massive marble foot is tucked away in a small alley near the Pantheon.

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

A single column facing the sea is all that's left of one of the most important temples of Magna Graecia.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Explore the quarry where the marble was sourced for Michaelangelo's David.

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

Gods clash with machines in a power plant regenerated as a museum.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Italian cave with exceptional acoustics and an unsavory history.

Ancient snack bar of the Roman Empire re-opened.

The world's most active stratovolcano is almost always erupting.

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Virgil's many-mouthed gateway to the underworld.

Pilgrimage site for star-crossed lovers.

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

Five candy-colored villages on the Italian Riviera.