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                                            Black Hole
                                              Naples, FL 
                                            
                                                
                                                    
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                                                             Max Depth:  Over 150ft/46m 
                                                            
                                                            Entry Type:  Boat 
                                                            Bottom Composition:  Rock 
                                                            Aquatic Life:  Might See Something 
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                                                             Winter:  71-75°F/22-24°C 
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            From ScubaDiving.com; some 27 miles southwest of Gordon Pass, in 65 feet of water, is the Naples Black Hole. Spanning 100 feet in diameter, this massive sinkhole drops more than 215 feet. Inside its circular shaft, the walls follow an hourglass shape, tapering at 115 feet. Nearby is the Naples Spring, an 82-foot-wide hole in 70 feet of water, with a well shaft that plummets to 224 feet.