The Omnia Vatican and Rome Card includes skip-the-line entry to major attractions and unlimited Hop-on Hop-off bus transportation for 3 days. The card focuses primarily on Vatican City. If you are spending more than 3 days in Rome, the Rome City Pass will give you more freedom to visit Rome and the Vatican at your own pace, as it offers you options between 1 and 7 days and unlimited use of the Hop-on Hop-off.