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Cave Diver, Anhumas Abyss, Bonito, Brazil: The Anhumas Abyss is an underground cavern with a crystal-clear lake below, more than 260 feet (79 m) deep. A visitor must enter through a narrow opening at the top of the chamber and rappel into the cave. Snorkeling and scuba diving in the lake reveal amazing scenery. Distinctive, conical limestone stalagmites and stalactites occupy the lake and the surrounding area, some reaching 65 feet (20 m) high. “One must rappel about 235 feet (72 m) to get down into this deep lake. The photo was taken at a depth of 50 feet (15 m). It was a challenge to create the image because of the high contrast, plus the diver could not see into the darkness, making communication impossible”. (Photo by Marcio Cabral/Nature’s Best Photography Awards 2017)
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