A water-filled natural limestone cavern, Dean's Blue Hole plunges 663 feet below ground level on Long Island, part of a string of Bahamian islands south of Nassau and New Providence Island.

For more information and details on activities at and around Dean's Blue Hole, check the section on the location at official Bahamas website. Hamilton's Cave has that name for a reason—it’s ...

Hold your breath for a thrilling free dive of Dean's Blue Hole, the world's third-deepest blue hole, or explore the stalactites at Hamilton's Cave, the largest cave system in the Bahamas.

It measures approximately 300 metres in diameter and has a depth of 124 metres. Dean’s Blue Hole (Bahamas) This natural marvel is the deepest known "blue hole" with a depth exceeding 200 metres.