Jill Heinerth captures the alien world of underwater caves. Long considered the world's most dangerous sport, Heinerth has managed to bring back stunning images from places few will ever experience.
Two highly experienced rebreather divers approach the Grim Reaper sign at Ginnie Springs inside Devil's Ear Spring. These signs are meant to warn untrained divers about the hazards of diving in underwater caves.
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Two highly experienced rebreather divers approach the Grim Reaper sign at Ginnie Springs inside Devil's Ear Spring. These signs are meant to warn untrained divers about the hazards of diving in underwater caves.