Arrecifes de Cozumel National Park
It is the second-largest reef in the world and one of the most beautiful. It is also known as "The Great Western Atlantic Reef Belt" or "Great Mayan Reef." It has a great biodiversity of marine flora and fauna. Some of the species that you can observe are turtles (hawksbill, white or green and the famous loggerhead), starfish, hedgehogs and the splendid toad fish, an endemic species of Cozumel.
From December to March you could be lucky to meet giant manta rays, an unforgettable show.