Dublin Gulch is located on the southern edge of Shoshone, California. I wasn't able to track down a lot of history on the place, but here are some generalities which are most likely accurate. The caves are dug into solidified volcanic ash that reportedly came from a Lava Creek eruption in Yellow Stone National Park, over 600 thousand years ago. One account claims they were dug in the early 1900s, another puts their creation during the late 1870s when a silver boom at the nearby Noonday Mines was in full swing. Regardless of when they were created, they are pretty amazing.