7157583 Railway line through the Royal Gorge of the Arkansas River on the Denver and Rio Grande Western Railroad, Colorado, USA (b/w photo) by American Photographer, (19th century); Private Collection; (add.info.: Railway line through the Royal Gorge of the Arkansas River on the Denver and Rio Grande Western Railroad, Colorado, USA. Illustration from Westlich! oder Durch den fernen Westen Nord Amerikas, by Dr Otto Zardetti (Franz Kirchheim, Mainz, 1897).); 穢 Look and Learn.