Blue Hole © USGS
Blue Hole is a world famous dive site situated off the east coast of Belize on Lighthouse Reef. The perfectly circular, deep blue sinkhole, surrounded by the lighter shades of the reef, has become an icon of Belize tourism. Explored in 1970 by Jacques Costeau, who declared it one of the best dive sites in the world, divers from all over the world now flock here for a chance to experience the exhilarating descent into its azure depths. There is not much sea life in the hole, and the dive is relatively short, so a trip is usually combined with other dives at Lighthouse Reef.