American Goldfinch, Illinois, August 6, 1941

Santo Domingo Church, San Cristobal, Chiapas, February 9, 1956

Concrete Statue of Virgin, Tlaxcala, Mexico, March 20, 1956

Cliffs and Rocks, Marsh Pass, Arizona, October 14, 1950

Cloud Formation and Sun, Grand Canyon, New Mexico, July 1958

Facade of Acolman Convent, January 12, 1956

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

Chocmol, Warrior Temple, Chichen Itza, Yucatan, Mexico, January 31, 1956

Louisiana Heron, Kissimmee Prairie, Florida, April 1954

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

Old Church, Road to Mexico D.F., February 10, 1951

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

Elephant Tree, Road to Bahia de los Angeles, Baja California, February 19, 1964

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

Church, Amatenango, Chiapas, February 15, 1956

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

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

Hillside with Dried Weeds Below Puertecitos, Baja California, February 17, 1964

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