Visitors can now walk along a 525-foot pathway through the subterranean levels of Rome's Colosseum. The area was once the backstage for gladiator fights, wild animal hunts, and even public executions.

Airbnb is teaming up with Paramount Pictures ahead of the release of "Gladiator II" to offer an experience where some visitors will be able to go inside the Colosseum after dark for a special ...