The Marietas Islands are two small islands in the northern part of Bahia de Banderas Bay, about 500 kilometers northwest of Mexico City. These volcanic islands are uninhabited. The Marietas Islands National Park has been declared on the islands and in the waters around them as a Ramsar Site and UNESCO MAB Biosphere Reserve. Since 2016, landing on the islands has been banned because significant damage to the coral reefs has been recorded from anchoring boats that brought tourists. In addition to coral reefs rich in marine life, the terrestrial part of the island is home to 44 species of flora and fauna, especially seabirds, of which blue-footed boobies and red-billed tropicbirds stand out. Visiting the islands includes diving excursions and observing bird colonies from a boat.