Snorkeling in Cozumel is like having a drink at the top of a mountain watching the sunset. The waters are so clear that you can see the bottom of the ocean from the boat. Reefs are not as shallow as other places in the world but I can assure you they are some of the best. Places like Colombia reef, Palancar Reef, Punta Sur, The sunken ship in front of Downtown Cozumel, will make you super happy.
