This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Tough Nut Mine Tombstone Arizona by Carleton Watkins. en Old South Shaft Ore Quarry Face of Toughnut Mine part of Town of Tombstone Arizona Dragoon Mountains with Cochise Stronghold in background mammoth plate by the American photographer Carleton Watkins Courtesy of the Yale Collection of Western Americana Beinecke Rare Book and