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Proyecto Espeleologico Sistema Huautla (PESH) Update

Sistema Huautla is the deepest cave in the Western Hemisphere, tied to the meter with a cave in Austria as the world’s ninth deepest cave, and is the 28th longest cave in the world as they are now known. It is 5,517 feet (1,560 m) deep, 55 miles (89 km) long, and has 29 entrances. The Proyecto Espeleologico Sistema Huautla (PESH) is an official project of the NSS.