Although reefs cover only one percent of the Earth s surface, they house 25 percent of all fish species. Reefs are the largest living structures on Earth, created over millions of years by tiny organisms, diving is your opportunity to discover this amazing underwater world. Come to Ambergris Caye, Belize and discover the underwater world up close. There are a wide variety dive spots and dive types along the Ambergris Caye stretch of the world’s 2 largest barrier reef.