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

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

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

Pilgrimage site for star-crossed lovers.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

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

Five candy-colored villages on the Italian Riviera.

An Italian hillside ghost town.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

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

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Thousands of well-dressed mummies below a monastery.

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

This picturesque Umbrian city has a subterranean side that has long remained hidden.

An omelette made with over 1,000 eggs may have been prepared when Holy Roman Emperor Charles V visited this monastery.

Only the facade of this house was built so a father could fool his son.

This medieval castle was reconstructed by Carlo Scarpa.

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

This massive rock balanced for thousands of years being tossed here during a volcanic eruption.

The sacristy of this church contains remains and relics of members of the Aragonese royal family.

The only visible remains of this ancient Greek underground temple is its roof protruding from the earth.

This tiny chapel withstood a massive mudslide and flash flood.

This uniquely designed bridge served as the city gate for Comacchio.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.