Usnea Lichen on Palo Santo, Barrington Island, Galápagos Islands, May 21, 1966

Lava and Cinder Contact, Sullivan Bay, James Island, Galápagos Islands, March 10, 1966

Old and New Lava with Lichen, Sombrero Chino at James Island, Galápagos Islands, March 11, 1966

Palo Santo on Crater Rim, Tower Island, Galápagos Islands, March 24, 1966

Swallowtail Gulls, Tower Island, Galápagos Islands, March 22, 1966

Single Scalesia Tree, Santa Cruz Island, Galápagos Islands, April 23, 1966

Turquoise Bay and Black Rocks, Hood Island, Galápagos Islands, May 25, 1966

Scalesia Tree, Santa Cruz Island, Galápagos Islands, April 23, 1966

Wolf and Darwin Volcanoes, Alcedo Mountain, Isabela Island, Galápagos Islands, May 4, 1966

Palo Santo and Cactus, Cartago Bay, Isabella Island, Galápagos Islands, May 8, 1966

Pahoehoe Lava and Green Vegetation, Tower Island, Galápagos Islands, March 23, 1966

Fallen Columns in Front of Temple of Zeus, Olympia, Greece, April 14, 1967

Corner of Temple of Concord, Agrigento, Sicily, March 20, 1967

Bareback Bronc Rider, High School Rodeo, Cleburne, TX 1984

Lazuli Bunting, Male and Female, Tesuque, New Mexico, July 31, 1960

The Moon Leaving a Tree, 1994

Lone Cowboy, High School Rodeo, Cleburne, TX 1986

Snail Hand, 1994

Oak Tree Shadow and Rising Moon, 1991

Bullfrog in a Beaker, 1995