Gray's Arch, Red River Gorge, Kentucky, April 16, 1968

Sunflowers and Sand Dunes, Great Sand Dunes National Monument, Colorado, September 10, 1976

Sunflowers and Sand Dunes, Great Sand Dunes National Monument, Colorado, September 10, 1976

Oak Forest, Pan Am Highway Below, Cerro de la Muerte Park, Costa Rica, March 15, 1984

Wind Clouds Over Dunes, Indian Springs, Colorado, September 12, 1976

Lichen on Brown Rock, Maroon Lake Area, Colorado, July 30, 1981

Sunset Clouds, Sleeping Rainbow Ranch, Capitol Reef National Park, Utah, August 28, 1963

Cloud Formations, Tesuque, New Mexico, July 1977

Aspen Forest with Yellowish Leaves in Foreground, Ashcroft Road, Colorado, September 17, 1959

Cottonwood Trees in New Leaf, near Red Wing, Colorado, May 21, 1975

Qilin, Monastery of the Jade Clouds, Beijing, China, September 17, 1981

Old Summer Palace, Yuan Ming Yuan, Beijing, China, September 17, 1981

Imperial Palace, Recently Opened, Beijing, China, September 18, 1981

Reconstructed Guardian, Fuhu Monastery, Emei Mountain, Sichuan, 1981

Yellow River in Flood, Baotou, Inner Mongolia, China, October 1, 1981

Pavilion and Bridge, Emei Mountain, Near Chengdu, China, October 17, 1981

Grass, Sand and Shadows, Great Sand Dunes National Monument, Colorado, September 29, 1959

Blueberry Bushes, Rocks, Spruce Trunks, Independence Pass Road, Colorado, September 16, 1959

Cottonwood Trees by Yampa River, near Steamboat Springs, Colorado, May 26, 1975

Pagoda in Buddhist Monastery, Near Xi'an, China, October 15, 1981