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Paperback
Cave divers are the elite, and this is their story--a story of pushing the limits of technology and human endurance. More
Paperback
Caverns Measureless to Man is the story of the passion of an extraordinary individual who spent his life exploring underwater caves. For nearly 30 years Sheck Exley was the ... More
Hardcover
From Greenland's ice grottoes to the "blue holes" of the Yucatan Peninsula and the limestone chambers of America's prime caving country, a select group of bold pioneers are ... More
Hardcover
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