Northern Arizona University has four separate digital collections, and this particular collection brings together items related to the broad expanse of the Colorado Plateau. The materials here cover the past century, and they include photographs of rock formations, Native American celebrations, and family portraits. There isn't a formal guide to the collection on the page, but visitors can perform a detailed search using the digital collections homepage. All told, there are over 32,000 items here, and the site will be best appreciated by historians, geologists, and art historians. Visitors can start their journey by searching for terms such as "riverbeds", "railroads", and "bridges". A delightful site, and one that warrants several return visits.