The Scavi Tour goes through the excavations below Saint Peter’s Basilica where the sacred tomb of Saint Peter is located. It is one of the most exclusive tours in Rome. Only 250 people are allowed through each day – compared to the 30,000 that visit the Vatican Museums. As a result, it's quite complicated to get tickets to this tour (you need to request by email or fax) and the tickets can sell out many months in advance. The details and instructions on how to request the tickets can be found on the official Excavations Office webpage. We thought the tour was interesting and informative but did not consider it the highlight of our Vatican visit like some of our fellow tour participants did.