Black Hills Mining Museum The collection was moved to Mariposa in 1983 after residing in San Francisco, for over a hundred years. Attracting 30,000 visitors a yr.Take in over 15,000 square ft of rocks, minerals, fossils and different fascinating Earth Science-associated objects. Pass via our indoor cave and discover http://judah580nh.ampblogs.com/Mining-For-Treasure-39201227