The Abaco Cays are the string of cays (pronounced "keys") lying along the north and northeast coastline of Great Abaco Island in the northern Bahamas. The Abaco Cays are world famous, so you've probably heard the names before—Green Turtle, Man-O-War and Elbow Cays, just to name a few. Between the cays and "mainland" Abaco are the protected, crystal-clear waters of the Sea of Abaco—as much a draw for boaters as the islands and communities around it.