Random FactsCuriousOneMay 12, 2015407, belize, blue, coast, deep, feet, Great, hole, sinkhole, submarineComment The Great Blue Hole, is a submarine sinkhole off the coast of Belize that is 407 ft. deep. Random FactsCuriousOneMay 12, 2015407, belize, blue, coast, deep, feet, Great, hole, sinkhole, submarineComment
