In Cozumel we did the Dolphin Encounter at the Dolphinarium. You can take a taxi there yourself. It's about 10 min. from the pier. The facility was very nice and clean and the staff all spoke English and were very professional and friendly. They will call a cab for you when you're ready to return to the ship. There is lots of shopping and cozy restuarants about a half mile walking distance down the street. We took a horse and buggy ride back for fun.