Located on Guam's south shore, this small cave is named for an ancient and powerful Chamorro Chief.

A beautiful waterway tucked in the corner of a power plant.

The red crab exhibits one of the most spectacular migrations on earth, despite manmade obstacles.

A tiny, remote island packed with wonders both natural and geeky.

A medieval military street hidden beneath a charming French fishing village.

The construction of a tram line unveiled hidden remnants of the old medieval city.

A beautiful modern church dedicated to the teleporting patron saint of Andorra.

This Miami cemetery holds the remains of two Cuban presidents, a Nicaraguan president, and the senior Desi Arnaz. And it was once the resting place of the crown prince of Spain.

Former villa and estate of James Deering developed to preserve native tropical forests.

A beautifully well-preserved ancient Roman villa.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

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

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.

Ancient snack bar of the Roman Empire re-opened.

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

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

The old church, buried by the 1784 Mount Vesuvius eruption, is a remarkably well-preserved place where people now pray for the souls of the dead.

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

Before the more famous Royal Palace of Caserta, the king of Naples first commissioned this overlooked residence.

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

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

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