Eastern Flicker, Flying, Great Spruce Head Island, Maine, July 22, 1968

Facade of Oratorio, San Miguel Allende, Mexico, January 3, 1956

Great Blue Heron, Titusville, Florida, April 24, 1954

Agaves and Cardon Cactus, on Road to Bahía de Los Angeles, Baja California, Mexico, February 19, 1964

Detail of Cardon Cactus, Road to Bahia de los Angeles, Baja California, February 19, 1964

Wet Sand at Edge of River, 29 Mile Rapid, Marble Canyon, Arizona, June 15, 1967

Beard Moss, Lichen, Teleki Ridge, Mount Kenya, Kenya, February 12, 1970

Green Algae at Low Tide, South of Mombasa, Kenya, October 22, 1970

Forest Floor, Mount Meru, Arusha National Park, Tanzania, September 19, 1970

Hidden Passage, Glen Canyon, Utah, August 27, 1961

Antarctica, January 1976

Barn Doors, Pelton Ranch, Fishtail, Montana, August 19, 1979

Relief Figures in Palace, Palenque, Chiapas, February 3, 1956

Rock Outcrop, Dinnehotso Road, Arizona, October 12, 1950

Cloud Formations near McGuire Pass, Colorado, August 1958

Stranded Iceberg, Bismarck Strait, Antarctic Peninsula, Antarctica, February 1976

Small Cascade, Galana River, Tsavo East, Kenya, October 20, 1970

Rocks on Hillside near Okie Landing, Baja California, February 17, 1964

Rain Drops on Bridge Window, R/V Hero, Antarctic Peninsula, Antarctica, March 1976

Abandoned House, Big Timber Road, Montana, August 22, 1979