Cozumel is an island in the Caribbean Sea off the eastern coast of Mexico's Yucatán Peninsula, opposite Playa del Carmen, and close to the Yucatán Channel. The island is covered with mangrove forest which has many endemic animal species. Cozumel is a flat island based on limestone, resulting in a karst topography. There are a number of visitors to the island's balnearios, scuba diving, and snorkeling. The main town on the island is San Miguel de Cozumel. The islands belongs to Cozumel Municipality of the state of Quintana Roo, Mexico.