In the summer of 2003, Thomas Joshua Cooper traveled to Shoshone Falls in southern Idaho to photograph where the Snake River had tumbled across a 212-foot precipice, once one of the most sublime landscapes in the American West. Cooper's images were a response to the work of Timothy H. O'Sullivan, photographer on the late-nineteenth-century geologic and geographic surveys led by Clarence King and George M. Wheeler. Traveling to Shoshone Falls in 1868,...