Harrison S.
Yelp
Unbelievable. The M.A.R. museum offers tours that include two crypts under the main church, and the remains of a Roman Villa under the crypt. The crypts are very cool - the villa is unbelievable. Currently only one room of the villa has been excavated, but that includes two walls with the most spectacularly preserved frescos - way better than any of the walls in Pompeii. The details are so well preserved that there are still plaster reliefs of cherubs, sea horses, etc. on the walls. It was stunning.
The whole tour is absolutely worthwhile - our tour guide was great and knew a lot about the site. She said they're currently working on excavating other sites in the vicinity - hopefully that's successful!
Either way this is a can't-miss stop in Positano. The tour was quick, about 20 minutes, and worth every penny.