It is the largest ecological reserve in Cozumel, dedicated to the conservation of its five ecosystems: coastal dunes, mangrove swamps, reefs, lagoons and beautiful beaches (sea turtle sanctuary). It has Mayan archaeological vestiges as well as areas for watching crocodiles, the historic Celarain Lighthouse with spectacular views, a Navigation and Cultural Museum, kayak and snorkeling tours, restaurant and snack bar. From the Colombia Lagoon, there are boat tours through the mangroves for bird-watching.