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Cascades, American Basin, Uncompahgre National Forest, Colorado, United States of America, North America
North Clear Creek Falls, Rio Grande National Forest, Colorado, United States of America, North America
Snow covered landscape and icy river, Blue Ridge Mountains, North Carolina, United States of America, North America
Lighthouse Field State Beach and Salt Rock, Santa Cruz, California, United States of America, North America
Sunset over Grand Canyon South Rim, UNESCO World Heritage Site, Arizona, United States of America, North America
Rock formations, Needles District, Canyonlands National Park, Utah, United States of America, North America
Half Dome viewed from Glacier Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Half Dome, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
View of beach and cliffs on Highway 1 near Davenport, California, United States of America, North America
Yucca plants on a dune, White Sands National Monument, New Mexico, United States of America, North America
Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
View of beach and cliffs on Highway 1 near Davenport, California, United States of America, North America
Open pit mine, the largest in the world, pit is 3800m across and 720m deep, Bingham Canyon Copper Mine, Utah, USA
Sinkhole Plain, polygonal doline karst, near Mammoth Cave, Kentucky, United States of America, North America
Part of the North Unit of Badlands National Park, carved out of the prairies by rapid water erosion of sediments, South Dakota, United States of America, North America
Spectacular coastline with waterfall, Julia Pfeiffer Burns State Park, Big Sur, California, United States of America, North America
The Pu'u O'o cinder cone, the active vent on the southern flank of the Kilauea volcano, UNESCO World Heritage Site, Big Island, Hawaiian Islands, United States of America, North America
The Pu'u O'o cinder cone, the active vent on the southern flank of the Kilauea volcano, UNESCO World Heritage Site, Big Island, Hawaiian Islands, United States of America, North America
Sedimentary rocks, clay, colour banded by iron oxides, horizontal Triassic Chinle Clay, Blue Mesa, Painted Desert, Arizona, United States of America, North America
Man and woman canoeing in Mirror Lake, Chugach Mountains, Anchorage, Alaska, United States of America, North America
Grand Canyon, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
John Ford's Point and the Three Sisters and cowboy on horse, Monument Valley, border of Arizona and Utah, United States of America, North America
Photographer with Mexican giant cardon (Pachycereus pringlei), Isla San Esteban, Baja California, Mexico, North America
Perfect example of strato-volcano, island cone left by subsidence, Crater Lake, Oregon, United States of America (U.S.A.), North America
View from the Alum Cave Bluffs trail in Great Smoky Mountains National Park, UNESCO World Heritage Site, Tennessee, United States of America (U.S.A.), North America
Puu O Kila lookout on the Na Pali coast, Kauai, Hawaii, Hawaiian Islands, United States of America (U.S.A.), North America
Fall colours in taiga, spruce, willow, dwarf birch and aspen, Susitna Valley, Alaska Range, Alaska, United States of America, North America
Woman looking at glaciers along the Seward Highway, Girdwood, Alaska, United States of America, North America
US Forest Service cabin, Shrode Lake, Prince William Sound, Alaska, United States of America, North America
Second Beach, Olympic National Park, UNESCO World Heritage Site, Washington state, United States of America, North America
St. Mary Lake and Wild Goose Island, Glacier National Park, Rocky Mountains, Montana, United States of America (USA), North America
Mist rising from the Cataloochee ski area, near Maggie Valley, North Carolina, United States of America (USA), North America
Old Faithful Geyser, erupts 60ft every 30 minutes, with pressure of 1000lbs per square foot, Napa Valley, California, United States of America (USA), North America
Grand Canyon, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Castle Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Vulcan's Throne, the west rim, above the Colorado River, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America (USA), North America
Looking over the Appalachian mountains from the Blue Ridge Parkway in Cherokee Indian Reservation, North Carolina, United States of America (U.S.A.), North America
Bayou in swampland at Jean Lafitte National Historic Park and Preserve, south of New Orleans, Louisiana, United States of America (U.S.A.), North America
Redoubt Mountain Lodge on Crescent Lake, Lake Clark National Park and Preserve, Alaska, United States of America, North America
Yellow flowering plants and loop road seen from Inferno cone, Craters of the Moon National Monument, Idaho, United States of America (U.S.A.), North America
Indian Field Creek, on Colonial Highway, near Williamsburg, Virginia, United States of America (U.S.A.), North America
Gullies eroded into the Pierre shales below Loop Road, Sage Creek wilderness, Badlands National Park, South Dakota, United States of America, North America
Upper and Lower Yosemite Falls, swollen by summer snowmelt, Yosemite National Park, UNESCO World Heritage Site, California, United States of America
Desert flora beneath Camelback Mountain, Echo Canyon Recreation Area, Paradise Valley, Phoenix, Arizona, United States of America, North America
Man and woman canoeing in Mirror Lake, Chugach Mountains, Anchorage, Alaska, United States of America, North America
Rock formation on the Nambe Chimayo road, Santa Fe, New Mexico, United States of America (U.S.A.), North America
Second Beach, Olympic National Park, UNESCO World Heritage Site, Washington state, United States of America, North America
Lower Falls of Yellowstone River, 94m high at head of canyon, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Erosion prevention, contoured bands of trees unfelled, also acting as fire break, Leadville, Colorado, United States of America, North America
Grand Canyon at sunset, UNESCO World Heritage Site, Arizona, United States of America, North America
Castle and Sawmill Geysers in eruption in Old Faithful Geyser Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Northern coniferous forest around Lake Skilak on the Kenai Peninsula, Alaska, United States of America (USA), North America
Rural landscape, San Juan Island, San Juan Islands, Washington state, United States of America, North America
Geysers in Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America
Brittlebushes with mountains behind, Sonoran Desert, Anza-Borrego Desert State Park, California, United States of America, North America