Isla Cozumel (Mexico)

Situated off the southeastern coast of the country, Cozumel Island encompasses diverse marine and terrestrial ecosystems rich in amphibian and reptile species. The main terrestrial ecosystems are medium semi-deciduous forests and mangroves. The biosphere reserve forms part of the second largest reef system in the world, the Mesoamerican Reef, which is home to 1,192 marine species. Nearly 80,000 live in the biosphere reserve, mainly in the city of San Miguel. Tourism is the most developed sector on the island, which has close to 40 Mayan archaeological sites.