Includes bonus interactive DVD. In the 19th century the great expeditionary photographers – William Henry Jackson, T H O'Sullivan, and William Bell – first photographed American western landscapes for the geological and geographical surveys. Mark Klett, Chief photographer of the Rephotographic Survey Project, revisited and rephotographed these 19th-century sites during the late 1970s, presenting 120 pairs of photographs separated by a century of change. Two decades later, Klett organised a new survey team to rephotograph 110 sites. This book presents forty-three pairings from the third survey, documenting two periods of geologic and environmental changes while exploring changing human perceptions of landscape. Published in association with the Center for American Places