Don't count on snorkling at all .. most likely you will be with two to 8 other people. But there was plenty of sight seeing, the cliff divers, a great overview of living in the city, etc. Some shopping, but not a lot. She does try to gear what the majority wish to do. We did stop at Sr. Frogs ust to eat and kill some time before the cross at the top of the mountain re-opened for the afternoon.