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

An elegant church is home to a remarkably detailed mosaic floor depicting the Garden of Eden.

This bronze boy sits on one of Capri's rocky cliffs, waving at the passing boats.

This clifftop arch is a natural stunner.

The Emperor Tiberius' palace of debauchery.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

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.

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

The glowing blue Nymphaeum of Emperor Tiberius.

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

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

The final resting place of New Orleans' most famous voodoo priestess.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

A snapshot of the city's fascinating voodoo culture.

A museum and shop on Bourbon Street located in the French Quarter.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

The murals have transformed a residential alley into a vibrant drive-through gallery.