Green River, Echo Park, Dinosaur National Monument, Colorado, August 13, 1958

Juniper Tree, Sand Canyon, Dinosaur National Monument, Colorado, August 12, 1958

Cloud Formation, Mineral Point, Colorado, August 10, 1958

Grass and Dead Sage Bushes, Echo Park, Dinosaur National Monument, Colorado, August 12, 1958

Cloud Formation, Mineral Point, Colorado, August 10, 1958

Dead Pine and Dunes, Great Sand Dunes National Monument, Colorado, September 22, 1960

White Stripe on Sheet Metal Wall, Howardsville, Colorado, August 16, 1957

Jerome, Arizona, April 22, 1940

Jerome, Arizona, April 22, 1940

Church, Silverton, Colorado, September 26, 1951

Long-horned Grasshopper, New Mexico

Spiny-bodied Spider

Cement Plant, near Salida, Colorado, September 1945

Black Gorge of the Gunnison River, Colorado, September 3, 1948

Miner's House, Leadville, Colorado, September 2, 1948

Collared Lizard, from Monument Valley, Utah, 1953

Dead Tree and Cloud, Mineral Creek, Colorado, August 10, 1958

Window, Weathered Clapboards, Animas Forks, Colorado, October 23, 1958

Old Hundred Mine, Cunningham Creek, Colorado, August 7, 1958

Wacker Drive, Chicago, September 1941