A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A terrific purveyor of natural history objects and curios.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

Three underground crypts and a pointed arch under the bell tower make this cathedral unique among Romanesque churches.

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

This Roman amphitheatre was also the location of the first gladiator school.

The tallest statue in Italy is also one of the world's tallest statues of Jesus.

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

Built on a medieval synagogue, this church has a burial crypt, tunnel system, and Jewish ritual bath hiding deep underneath.

A long-buried ancient ruin unearthed right in the middle of the city.

A small Byzantine church lost in the middle of the mountains of southern Italy.

This Torino museum honors a soldier who kept the city safe using barrels of exploding gunpowder, losing his life in the process.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

Suffocating dogs was a common spectacle in the fumes of this noxious cave.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

A quiet Sicilian village is home to a cafe that had an important role in "The Godfather."

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

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

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

The sunlight passing through the opening of this huge cave system creates a magical effect.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

This amazingly preserved Doric temple was abandoned before it was ever completed.