oooh a crusing virgin, we love you!!
Grand Caymen - the sting rays are a must-do- book this on your own, lots of good tour operators to choose from - our personal favorite is Captain Marvin - web site same as the name, very reputable. You can snorkel if you like, or when you get to the sandbar you can stand in the water and be amazed by these creatures, you can pet them, and feed them if you look, most of the time they just swim around you, when they brush up against you if feels like a gentle tickle. The turtle farm is another fun trip to take especially if you have little ones - the little ones seem to just love the turtles.
If you just want to hang out at the beach all you need to do is grab your beach stuff, grab a cab and head to7-mile beach. Its a public beach. You can use the hotels beaches and facilites but they do charge for that.
Cozumel - if you snorkel or want to try it, this is the place- some amazing snorkeling here- it takes an excursion out to the Palencaar Reef - but it is wonderful - book a ship's excursion to do this. If you want to do a Dolphin Swim you do that at Channunkaab National Park - they book up really fast do it right away www.dolphindiscovery.com
. This park also has a nice beach, good food, aquarium, small gift shop, mini replica of the ruins, good snorkeling here also. If you just want to hang out at the beautiful beaches there are plenty of those to choose from that are just a cab ride away. Playa del Sol and Mr. Pancho's are the favs. You can also tour the Mayan Ruins - this is basically an all day trip - it takes some getting there, book with the ship just to be on the safe side. No trip to Cozumel would be complete without a stop at Carlos'N'Carlies for a monster marquerita.