A lover's walk between hilltop towns, decorated with graffiti love notes.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Italian cave with exceptional acoustics and an unsavory history.

Ancient snack bar of the Roman Empire re-opened.

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

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

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

This magical-looking island is notorious for the misfortunes suffered by its owners.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

This winding road through an Italian canyon may be the most scenic drive in the world.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

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

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

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

A Nesting Doll of Churches.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

Go inside to really appreciate this 500-year-old technological masterpiece.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Ruins of a 10th century church tucked away deep in a botanical garden.

This 16th-century monastery has been turned into a surrealist architecture compound.