iSimangaliso Wetland Park, South Africa
Credit: Gavin Parsons / Getty Images

The vast iSimangaliso Wetland Park, a World Heritage Site, includes the African continent's largest estuarine system and takes in Sodwana Bay Marine Preserve. There, Adlams Coral Reef hosts more than 80 percent of the world's marine fish species along with rays, eels, dolphins, and whale sharks, all under the excellent visibility of Indian Ocean waters. Humpback whales cavort offshore May to November, and November to January, leatherback and loggerhead sea turtles nest on the beaches. Kosi Bay, in the northern, most remote part of the park, is the site of a nursery reef and on between-snorkel breaks, you'll likely have the white, palm-fringed beach to yourself. Accommodations available in the park, or book an all-inclusive guided excursion with Cape Fox Tours.