A cross inlaid in the floor of a library marks the spot where Indiana Jones has to dig to access the ancient catacombs ... hidden in Rome, in the catacomb underneath the Basilica of San Lorenzo ...

Within the San Sebastiano Catacomb, which stretches for 7.5 miles, you will see its namesake and Christian martyr, Saint Sebastian ... Before visiting Rome's catacombs beneath the Appian Way ...