How Have National Parks Changed Over Time?

Viewing photographs of different eras in the national parks can give many insights on ecosystem processes, as well as simply change over time. The photographs associated with panoramic lookout photographs provide a window on the past, and an opportunity to compare to the present with changes to land forms and land cover.

Modern Photographers

Photos of the modern photographers chronicling change over time by retaking panoramic lookout photographs in Yellowstone and Glacier national parks.