Friday, July 06, 2012 BAHAMAS "BLUE HOLES" HOLD WONDERS and WEIRD SCIENCE Mysteries within: From a cove on Long Island, the cave known as Dean?s Blue Hole plunges more than 600 feet into darkness. Photos by Wes C. Skiles, National Geographic Bahamas' 'blue holes' hold wonders and weird science Updated 7/21/2010 3:11