National Natural Landmarks

Black Chasm Cave

Black Chasm Cave
Black Chasm Cave. Photo by D. Bunnell.

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 ; Amador County, CA

Year designated: 1976

Acres: 60

Ownership: Private

← Back to NNL listing for CA.

← Back to listing of all states and territories.

Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.

Experience More


  • Site Index