Pillar of Hercules, Big Thompson Canyon, Rocky Mountain National Park, Colorado. 1913.

Album caption and index card: Rocky Mountain National Park, Colorado, picture by the Union Pacific Railroad, 1913. Pillar of Hercules, in the Big Thompson Canyon. There are many wonderful and fantastic formations on the road, and this extraordinary stratum of rock is one of the most interesting and gigantic. Note: Whenever this photograph is reproduced, it must have stated immediately beneath the reproduction: "Courtesy of the Union Pacific Railroad." Handwritten notes on album caption: Long's Peak quad., Larimer County, Colo.