Just came back from a quick trip to Cozumel with my son. Not being a scuba diver we thought we would snorkel and see the coral and reefs. Our hotel set us up with a day long catamaran trip for snorkeling and Snuba. Snuba means you dive 20 feet under the water tethered to an airhose. You don't have to be certified and is great for the non-diver to experience diving. Being able to see the fish and coral up close and personal was breathtaking. It's probably one of the best kept secrets of Cozumel.