Ansel Adams, the late American photographer and conservationist, was born on Feb. 20, 1902. His sweeping images of U.S. landscapes helped galvanize the country's nascent conservation movement last century, part of a decades-long effort to expand the national park system and popularize the idea of preserving wilderness.
This legacy warrants some reflection on his birthday — and since a picture is worth a thousand words, here are about 10,000 "words" to honor Adams' historic contributions to nature conservation:
Snake River, Grand Teton National Park, Wyoming
Canyon de Chelly National Monument, Arizona
Jackson Lake, Grand Teton National Park, Wyoming
Leaves in Glacier National Park, Montana
Rocky Mountain National Park, Colorado
Crystal Spring, Carlsbad Caverns National Park, New Mexico
Castle Geyser Coye, Yellowstone National Park, Wyoming
McDonald Lake, Glacier National Park, Montana
Saguaro National Monument, Arizona
Unnamed peak, Kings Canyon National Park, California
To see more of Adams' indelible imagery from U.S. national parks and monuments — mainly from 1941 to 1942, when he was working under a federal contract — check out these collections kept by the National Archives and the Interior Department.
All photos courtesy U.S. National Archives