The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

A submerged archeological park still holds the wonders of a Roman Sodom.

Virgil's many-mouthed gateway to the underworld.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

This large, circular tomb is the final resting place of the first emperor of Rome.

A large replica of a monumental Roman inscription is located on the side of this museum.

If you want to talk to the Pope you will have to stare down this surreal vision of Jesus rising from a nuclear hell.

A hidden workshop for creating and restoring Papal mosaic masterpieces.

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

This natural "sea of stones" was once used by the Romans as a quarry.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

It's forbidden to dig within this ancient Roman fort hidden beneath a playground.