This is the famous blue hole in Hoffman's Cay in the Berry Islands. After hiking a short trail for about 5 minutes, you arrive at the lip. You're standing on a ledge that is significantly undermined by a vast cavern underneath you. There is a trail next to the lip that leads down to the cavern.
The Bahamas is a nation consisting of 29 islands, 661 cays, and 2,387 islets (rocks). It is located in the Atlantic Ocean north of Cuba andHispaniola (Dominican Republic and Haiti), northwest of the Turks and Caicos Islands, and southeast of the United States (nearest to the state of Florida). Its land area is 13,939 km2 (5,382 sq mi), with a population of 353,658. Its capital is Nassau. Geographically, The Bahamas lie in the same island chain as Cuba, Hispaniola and the Turks and Caicos Islands.source: Wikipedia