Black Chasm Cavern – Volcano
While Black Chasm Cavern was likely known about by the local Miwok people who existed in this area long before the gold rush, the first documented exploration occurred in 1854 […]
Field Trip Categories: Caves
While Black Chasm Cavern was likely known about by the local Miwok people who existed in this area long before the gold rush, the first documented exploration occurred in 1854 […]