Cenote or Spring-Fed Pool, Yucatan, 1960s 1960–1969 Alpine Lake with Mountain Village, Central Europe, 1950s–1960s 1950–1965 Niagara Falls from the Canadian Shore, 1940s–1950s 1940–1955 Alpine Gorge with Chapel, Central European Mountain Valley, 1950s 1948–1960 Mountain Road Construction, Alpine Region, circa 1950s 1945–1960 Mammoth Hot Spring Terraces, Yellowstone National Park, circa 1940s 1950–1959 Mountain Valley Viewed from a Tunnel Window, Mid-20th Century 1945–1965 Mine entrance with surveying equipment, Appalachian coal region, 1930s 1930–1939 Alcatraz Island from the Bay, San Francisco, 1950s 1950–1959 Sandstone Canyon Wall with Natural Arch, American Southwest, 1950s 1950–1959 Accidental Exposure, Rural American Highway, 1950s 1950–1959 · 1950s Formal Garden Border, ca. 1940s–1950s 1940–1955 Desert Landscape with Eroded Butte, Mid-20th Century Color Survey 1950–1965 Aerial View of Formal Gardens on a River Peninsula, American South, 1950s 1950–1959 Eroded Hillside with Highway Cut, 1950s America 1950–1959 Egrets in a Florida Spring, 1950s 1950–1959 Morning Glory Vines on House, 1950s 1950–1959 Rocky Shoreline with Waves, 1950s 1950–1959 Mountain Valley in Winter, 1950s 1950–1959 Japanese Iris Garden, 1950s 1950–1959 Suburban Backyard with Decorative Flamingos, 1950s 1950–1959 Alpine Wildflowers, 1950s 1950–1959 Mountain Stream with Overhanging Deciduous Growth, 1950s 1950–1959 Suburban Lawn, 1950s 1950–1959 Columbine and Mountain Flora, 1950s Alpine Study 1950–1959 Basalt Quarry or Strip Mine, 1950s American West 1950–1959 Field Scabious in Bloom, 1950s Garden Study 1950–1959 Rock Formation in Mediterranean Landscape, 1950s 1950–1959 Rapids and Outbuilding, 1950s 1950–1959 Mountain Valley in Snow, 1950s Alpine Region 1950–1959 Frozen Shore with Wrecked Vessels, Great Lakes, circa 1950s 1950–1959 Green hillside overlooking coastal plain, aerial view, 1960s 1958–1972 Formal Garden with Massed Plantings, Mid-20th Century 1945–1965 Mountain Forest with Fallen Timber, Western Wilderness, circa 1950s 1950–1960 Geological Survey or Educational Expedition, Badlands Outcrop, mid-20th Century 1945–1965 Alpine Peak with Glacial Scree and Subalpine Forest, Pacific Northwest, mid-20th 1940–1955 Mount Shasta from the North, 1940s 1940–1950 Burned Forest in Snow, Northern Boreal Region, 1940s 1940–1950 Northern Forest River with Birch and Conifer Woodland, Mid-20th Century 1950–1965 Boreal forest and lakes from aircraft, northern Canada, circa 1950s 1948–1965 Submerged Wreckage, Tidal Zone, circa 1950s 1950–1965 High Desert Basin with Sagebrush, Mountain Range Beyond, circa 1950s 1950–1960 Hoodoo Formation with Stream, High Desert Southwest, circa 1940s–1950s 1940–1955 Mountain Vista with Pasture and Structure, circa 1950s 1950–1965 Sierra Nevada Forest, California, circa 1950s 1948–1958 Colorado River Valley with Desert Buttes, Arizona or Nevada, 1950s 1950–1960 Mountain River Canyon, Western Conifer Forest, circa 1950s 1948–1958 High Desert Meadow with Conifer Forest Edge, Pacific Northwest, circa 1960s 1960–1975