Endowment Mine
This fairly remote and old silver, lead, and zinc (with some traces of gold and copper) mine is a pretty neat site. The old camp dates from the 1870s and was reworked in the 1920s.
Guy has explored the deserts and mountains of the Western US for over three decades. In that time, he has found a couple of hidden and remote locations that don't see many visitors. The best way to contact him is on this site.