We did a dune buggy exursion(the other group drove a jeep) a couple of years ago, where we followed our tour guide around to different spots in Cozumel. The first stop was to a snorkeling site/restaurant, where we went snorkeling and then ate lunch. The next stop was to a lighthouse on a beach, where we were able to climb to the top of the lighthouse. The next stop was to a beach, but it was too rough to swim. The final stop before returning to the ship was to a tequila tasting tour.