In Cozumel my husband and I did the Mayan Ruins tour. We were really looking forward to that and had chosen the cruise we did because of that excursion. We were disappointed because we weren't able to get close enough to look inside, but still it's an awesome thing to see! Plus you can go down to the beach at the bottom of the cliff and swim before going back to the ship. Some folks at our dinner table did the Jeep rental and loved that as well. While others enjoyed shopping at the market.