The Vatican Necropolis, not to be confused with the Vatican grottoes, is a super special, pre-booked visit to the archaeological dig to the tomb of St Peter, under the Vatican Basilica. Visits are run by the Excavations Office with careful attention to the conservation of the historical-archaeological site, allowing only about 250 visitors a day, in groups of 10. Each group is accompanied by their specialized guide and takes about an hour and a half, ending up in the basilica above. Note, it can be hot and claustrophobic but, trust us, no matter what your creed, it is an unforgettable visit.
In the Vatican - the bones of St Peters