Cunningham Gulch, Colorado.
East of Silverton 5 miles. Turn right at Howardsville. A sign says Old Hundred Mine tour. That is Cunningham Gulch CR-4. Lots of mining history here. Photo looks North from above the Highland Mary mine. Photo shot at about 10800 MSL.
Nikon D3, Nikkor 70-300 f4.5-5.6 ED G at 70mm. f/16 200 ISO. Processed in Lightroom 4, Nik HDR Efex Pro, Nik Sharpener Pro 3.