The Silver Mines of Tombstone, Arizona

You may know of Tombstone Arizona as the place where the OK Coral firefight occurred, and certainly everyone knows of Wyatt Earp, et al. But the town "Too tough to die" became because of silver. There are a number of old mines outside the town. You need to read the Wikipedia summary of its history. It is thorough and has lots of photographs.

Ed Shiefflin in Tombstone in 1880

Inside the Shiefflin mine