Over the past century, a host of photographers have documented the grounds and buildings of the National Parks for the National Park Service, and in doing so have created a collection that contains over two million images. Some of these eminent photographers include such personages as Jack Boucher, Arno B. Cammerer, and Abbie Rowe. The National Park Service has recently placed 2000 of these images online, and added a fine search feature so that users can look for images by year, photographer, theme, parksite, or keyword. Some of these images included early photographs of the Virgin Islands National Park, rangers on location in Yosemite National Park, and Canyon de Chelly National Monument. The site is rounded out with links to other digital image archives, such as those housed on the American Memory website at the Library of Congress.