Aerial view of visitors at El Requeson beach on the Sea of Cortez near Mulege, South Baja California state, Mexico on July 20, 2021. - The Gulf of California, also known as the Sea of Cortez, and its islands are part of UNESCO's World Heritage list as home to 695 vascular plant species, more than in any marine and insular property on the World Heritage List. Equally exceptional is the number of fish species: 891, 90 of them endemic. The site, moreover, contains 39% of the world's total number of species of marine mammals and a third of the world's marine cetacean species. (Photo by Guillermo Arias / AFP)