We had been to the Tulum Ruins on our previous cruise (amazing tour) so we decided to something on the island instead. We went to Chankanaab Park so my husband and 2 oldest could snorkel while my youngest and I hung out in the lagoon. The park was very nice. I pre-paid admission and snorkeling which saved some money. We simply took a taxi ($15 each way for all 5 of us), showed our proof of purchase, and we were in. The beach was very nice and clean. It was fairly empty when we arrived, so we had no problem getting lounge chairs. There are vendors there, but they weren't pushy and left us alone when we said "no thank you". We all enjoyed our activites and didn't feel rushed, liked on a lot of tours. We normally opt for activities to see the "real" area we are making port in, this is not it (we saw a lot of that on our private tour last year). This is great if you are looking for anything from a dolphin experience, to snorkeling, to relaxing on the beach.