Black Chasm Cavern
Show Cave · Volcano, California
A National Natural Landmark near Volcano in the Gold Country, designated specifically for its helictites — rare crystal formations that grow sideways and upward against gravity, in defiance of how a stalactite is supposed to behave. Black Chasm has one of the finest displays of them anywhere in the world.
15701 Pioneer Volcano Road, Volcano, California, 95689, United States
Open daily, generally 10:00 to 17:00 with seasonal variation. Guided tours roughly hourly.
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