8. Royal Gorge of the Arkansas
This William Henry Jackson photograph, c. 1885, shows the tracks of the Denver and Rio Grande running into the narrow Grand Canon, or Royal Gorge, of the Arkansas River. Workers and equipment were lowered by ropes from the rim to construct the roadbed and track. (Milstein Division of United States History, Local History & Genealogy, The New York Public Library, Astor, Lenox and Tilden Foundations)