Firs and Sword Ferns, Hoh Rain Forest, Olympic Peninsula, Washington, July 24, 1975

Airplane View, Congaree Swamp in Flood, South Carolina, April 19, 1969

Water Tupelo and Cypress Knees, Congaree, South Carolina, October 25, 1969

Cypress Trunks, Frenchman's Pond, Congaree, South Carolina, October 25, 1969

Loblolly Pine Bark, Congaree, South Carolina, October 26, 1969

Ocean-eroded Sandstone, Cape Kiwanda, Oregon, July 15, 1975

General View of Theater, Pergamon, Turkey, April 2, 1971

Lichen on Tombstone, Necropolis, Hieropolis, Turkey, April 6, 1971

Flowers Growing on Theater Seats, Laodicea, Turkey, April 6, 1971

Flowers Growing on Theater Seats, Laodicea, Turkey, April 6, 1971

Agora and Poplars, Aphrodisias, Turkey, April 5, 1971

Agave lechuguilla, Rough Spring, Big Bend National Park, Texas, November 4, 1978

Ionic Capital in Library, Ephesus, Turkey, April 4, 1971

Snowbank in Forest, Meadows, Mount Hood National Forest, Oregon, July 18, 1975

Sand, Rocks and Pools, Second Beach, Olympic Peninsula, Washington, July 26, 1975

Fog in Valley, Chisos Mountains, Big Bend National Park, Texas, November 4, 1978

Tree and Rocks, Music Temple, Glen Canyon, Utah, September 23, 1961

Water Stains and Red Flower, Hidden Passage, Glen Canyon, Utah, September 22, 1961

Water Stains and Red Flower, Hidden Passage, Glen Canyon, Utah, September 22, 1961

Water Stains and Red Flower, Hidden Passage, Glen Canyon, Utah, September 22, 1961