Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Secret refuge and museum of the Duke of Florence.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

Abandoned medieval hill town.

A huge enchanting public park just outside the ancient walls of Rome.

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

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

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

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

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

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

A Nesting Doll of Churches.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Crushed coral and crystals give the sand its signature coloration.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

An Italian hillside ghost town.

Five candy-colored villages on the Italian Riviera.

A forgotten "city of water" underneath the famous Trevi district.

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