Joyce Sherwood Secciani

Animal Shaped Rock with Petroglyphs near Bishop, California

The Headquarters of the Sociedad Proteccion Mutua de Trabajadores Unidoes (The Society for the Mutual Protection of United Workers). Adobe.

Pictographs and Petroglyphs, Canyon de Chelley, Arizona

Untitled, Rio Abiseo National Park, Peru

Shed with Blue Dotted Lines, Penland, North Carolina

Canyonlands, Utah

Spanish Alphabet, Inscription Rock, New Mexico

Cave Kiva, White Rock, NM

Marguerite Hughes Killen

Ferdinand Christian Helwig, M.D.

"Thirteen Faces," Canyonlands, Utah

Mangrove Roots in Tunnel, West Lake, Everglades National Park, Florida, March 3, 1954

Ghost Crab, Dragon Hill Beach, Santa Cruz Island, Galápagos Islands, March 13, 1966

Marine Iguana, Academy Bay, Santa Cruz Island, Galápagos Islands, March 15, 1966

Land Iguana, Cartago Bay, Isabela Island, Galápagos Islands, May 8, 1966

Circular Structure, Epidaurus, Greece, April 7, 1967

Columns of Temple, Bassae, Greece, April 11, 1967

Stairs, Hagia Triada, Crete, March 19, 1970

Propylaea, Acropolis, Athens, Greece, March 31, 1967