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Onyx Cave

Onyx Cave
Onyx Cave

Onyx cave, located within Coronado National Forest, is considered to be the finest cave in Arizona. Helictites and speleothems, such as shields are numerous and beautifully developed.

Location: Santa Cruz County, AZ

Year designated: 1974

Acres: 50

Ownership: Federal


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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