Go deep down into the earth to experience the world of Welsh coal miners.

A crumbling watchtower and a lighthouse overlooks the site believed to be the Sirens' cliff in the "Odyssey."

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

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

In 1988, jazz legend Chet Baker fell to his death from a window of this hotel facing Amsterdam Centraal.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

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

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This ancient market is often referred to as the oldest shopping mall in the world.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

A Nesting Doll of Churches.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

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

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

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

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.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.