Ancient Mayan culture in Cozumel It's easy to get lost in the abundance of local offerings, so I've put together a rich itinerary for you to get to know all the facets of Cozumel. Explore the ruins of the city of San Gervasio, learn about the cult of the goddess Ish Chel; explore the world's second largest coral reefs with stunning underwater life; swim with dolphins; and, if desired, visit a tequila factory and a pearl farm.