Share article to Structures from the Old Hundred Mine cling to the side of Mt. Galena in the San Juan Mountains in San Juan County. Map: Image by: Worthington, C. R.Date: Between 1904 and 1908Source: Top of the world, from No. 2 level, Old Hundred Mine, Silverton, Colo.Copyright Notes: Courtesy of Denver Public Library, Western History/Genealogy Department Image identification # Z-2562