Descend into the chill of Rome’s mysterious underworld with Skip-the-Line access to three of the city’s strangest discoveries. Unmask a new side to the Eternal City as you explore the eerie Bone Chapel, adorned with the bones of 4,000 Capuchin monks, and the Christian Catacombs, a series of hidden tunnels where early Christian’s practiced their forbidden faith. Then travel beneath Basilica of San Martino ai Monti, a hidden gem tucked away in the city’s historic core.