Pompeii was just another ancient Roman city before August 24th, 79 AD. Longer visits will have you acting like the little ones, especially on a hot day. Realistically, you can see most of the highlights in 4 hours without kids. The ruins of Pompeii cover 44 square hectares, and it would take at least two full days to tour the entire park. We spent a good three hours there, but I think it was because of the kids we left so early. Stroller woes How many hours do you need in Pompeii?