Hall City Cave

The Hall City Cave is a limestone cave system near Hayfork, California, United States. Exploration was documented in 1903, with a Permian age ammonite fossil discovered. A cavern in the Hall City Cave contains a deep shaft of water. The Hall City Cave was a sacred place for the Nor-el-muk and other Wintu Native Americans. Edith Van Allen Murphy interviewed a long-surviving Wintu woman named Lucy; the papers are kept at the Held-Poage Museum in Ukiah, California in the Estle Beard Notes, box 2, Notebook g, p 15

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).