This marvelous digital collection draws on materials held in the collection of Southern Methodist University's DeGolyer Library. The Library holds over 500,000 images that document the American West, borderlands, exploration, and the development of the Western railroads. This particular collection brings together over 540 digitized items, including Alexander Gardner's 1867 portfolio, "Across the Continent on the Kansas Pacific Railroad (Route of the 35th Parallel)". Also part of the collections here are postcards of cowgirls, Native Americans in Oklahoma, and lantern slides of Mexico and California. Visitors should not miss the "Stereographs of the Dakota Territory", which include late 19th century images of Deadwood and Crook City. The site is rounded out by a photographic study by William Henry Jackson titled "Les geysers d'Amerique".