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Black Chasm Cave
Black Chasm Cave is a small three-level cave containing an outstanding variety of speleothems and some of the best helictite formations in the West.
Location: Amador County, CA
Year designated: 1976
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Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012