We enjoyed the Kon Tiki Sightseeing, Fun, and Beach excursion in St Thomas. It was a boat ride (rum punch included), with a little narrated tour and some music. There was a time they opened up the glass bottom but there wasn't much to see there. We had a better view over the side of the boat. Once at the beach I'm not sure if there was an area to snorkel or not (we aren't much for snorkeling), but it was a nice beach. Note, chairs and umbrellas are not included in the cost of the tour. They were extra. On the way back there was more music and they did some fun stuff like the conga line, limbo contest, and sort of a name that tune game with the band. We don't like to be gone from the ship for too long and this was about 4 hours...perfect for us!