Everglades National Park
In 1976, Everglades National Park was declared an International Biosphere Reserve by UNESCO, which also listed the park as a World Heritage Site in 1979. The Ramsar Convention designated the Everglades a Wetland of International Importance in 1987. Only three locations on Earth have appeared on all three lists: Everglades National Park, Lake Ichkeul in Tunisia, and Srebarna Lake in Bulgaria.