Photographic comparison of the Valley of Ten Thousand smokes in 1917 and modern day. The 1917 photograph is published in Griggs, 1922.
Image courtesy of USGS.
Please cite the photographer and the U.S. Geological Survey when using this image.
To obtain a high-resolution image, open the full size
page. Then, right click on the image and click
"Save Image As..." or "Save Picture as..."