To reach the 21-mile-long ... in the Bahamas and the second deepest in the world at more than 600 feet. A few miles southeast of the sinkhole, travelers will find Clarence Town, the island's ...

A water-filled natural limestone cavern, Dean's Blue Hole plunges 663 feet below ground level on Long Island, part of a ... beach and diving off the cliffs. Bahamas: Swimming Pigs, Snorkeling ...