The next day we were at Port Calica. We purchased the XCaret excursion, which was $175 for the family. In a nutshell, I did not get my moneys worth, though it wasn't a total loss. We were taken by air conditioned bus to the park. It is quite large and the problem is that there is not enough time to see it all if you plan to go to Playa Del Carmen also. We visited the museum and snorkeled the underground river. My little one had to get out early because the water was too cold. Do not pay the $10 for the snorkel equipment because you don't need it. There is nothing to see under the water except for two spots. Just get a life jacket and float it. The water is fresh, but brackish. I did not do the other river because we didn't have time. They do have a pretty beach and some neat sights. Be aware that they will give you pesos for change when you buy something, claiming to not have dollars. One tip I found out about on the bus, they don't allow sunscreen in the park because of the water. Lather up before you go. I'm not getting skin cancer for a fish. We taxied directly to Play Del Carmen for $10, asking him to take us to Senor Frogs. I found that most of the prices were cheaper than Cozumel, but not all. This town has the most beautiful beach I've ever seen. We had to go in :) We swam for a while then went to Senor Frogs for beer and nachos. It was open air right on the beach, really nice. After that, it was back to the ship. The merchants set up outside the ship and this was the best place to get bargains. They realize this is the last chance to sell you something and they work hard to do it. Just be ready to walk and they will deal with you.