This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A sculpture serving as an homage to Pope John Paul II.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

What appears to be an ancient Roman temple is actually a Catholic church.

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

This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

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

Well-preserved, still-functional sliding wood doors from Ancient Rome can be found in this Vesuvius-stricken house.

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

Ancient snack bar of the Roman Empire re-opened.

The walls and streets of the ancient city are peppered with penises.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

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

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

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

An eerie, little-known Neapolitan museum filled with preserved human remains.

Rusting hulk stands in testament to the Keweenaw Peninsula’s rich history of copper mining.

Art blooms at this unique outdoor gallery along the banks of the Arkansas River.

This steep slide at a kids’ playground went viral after an police officer tumbled down it.

These pretty kitties killed and ate as many as 135 railway workers.

Drink a Guinness under the wings of Reagan's retired Air Force One in his presidential library.