Black Chasm Cavern centers on rare helictite formations, a blue underground lake, and Sierra Foothills Gold Rush context.
Volcano is the nearest town listed for Black Chasm Cavern.
The History & Geology
Visitors see three chambers in the upper levels of this vertical cave and the most prominent formations grow in those upper sections.
The blue underground lake sits in the second chamber about 80 feet below the viewing platform, which is the clearest factual description currently in the dossier.
The route uses three platforms and five flights of stairs and is led by an experienced Cavern Naturalist, so the visit is guided and compact rather than a long free-walk cave stop.
