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Durango & Silverton Train, Colorado, United States of America, North America
Sand dunes in the Great Sand Dunes National Park and Preserve, with Sangre Cristo Mountains in the background, Colorado, United States of America, North America
Green-winged teal (Anas crecca) hen swimming, Pike and San Isabel National Forest, Colorado, United States of America, North America
Aspen trees in autumn below Longs Peak, a mountain above 14000 feet, known as a 14er, Rocky Mountain National Park, Colorado, United States of America, North America
Llamas at Laguna Colorado, Eduardo Avaroa Andean National Reserve, Bolivia, South America
Mount Sneffels with snow in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Yellow aspen leaves on a lichen-covered rock in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Aerial photo of Colorado River and the Grand Canyon from Papillon Helicopter, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Denver Art Museum, Civic Center Cultural Complex, Denver, Colorado, United States of America, North America
Tourist overlooking Horseshoe Bend on the Colorado River, Page, Arizona, United States of America, North America
Silverton, Colorado, United States of America, North America
Dawn near Stony Pass, Rio Grande National Forest; Colorado, United States of America, North America
Punta Colorado, Isla San Jose, Gulf of California (Sea of Cortez), Baja California Sur, Mexico, North America
Waterfall, San Juan National Forest, Colorado, United States of America, North America
Hazleton Mountain in the winter, San Juan Mountains, Colorado, United States of America, North America
Snow-covered mountains covered with fog, Ouray County, Colorado, United States of America, North America
Aspens in the fall in fog, Grand Mesa National Forest, Colorado, United States of America, North America
Heavy erosion, Los Colorados, Salta region, Argentina, South America
Alpine sunflowers (Hymennoxys grandiflora), Maroon Lake, Maroon Bells Peaks in background, Maroon Bells Scenic Area, Colorado, United States of America, North America
Sneffels Range with aspens in fall colors, near Ouray, Colorado, United States of America, North America
Wildflowers and mountains near Cinnamon Pass, Uncompahgre National Forest, Colorado, United States of America, North America
Goose Neck on Colorado River, Utah, United States of America, North America
Mount Sneffels with a dusting of snow in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Colorado River from Dead Horse Point Overlook, Dead Horse Point State Park, Utah, United States of America, North America
Clouds over the San Juan Mountains, San Juan National Forest, Colorado, United States of America, North America
Cascades and elephant heads (little red elephants) (Pedicularis groenlandica), San Juan National Forest, Colorado, United States of America, North America
Cloudy sky above an Alpine tarn, San Juan National Forest, Colorado, United States of America, North America
Fall colours, Telluride, Western San Juan Mountains in the background, Colorado, United States of America, North America
Blue columbine (Colorado columbine) (Aquilegia coerulea), San Juan National Forest, Colorado, United States of America, North America
Rio Grande National Forest, Colorado, USA
Colorado Plateau, Canyonlands National Park, Utah, USA
Lions Head Village ski run, Vail Ski Resort, Rocky Mountains, Colorado, United States of America, North America
Male mountain bluebird (Sialia currucoides), Douglas County, Colorado, United States of America, North America
Cascades on the Big Bear Creek in the fall, San Miguel County, Colorado, United States of America, North America
Pit House, Step House Ruin, dates from 626AD to 1226AD, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America
Mears Peak with snow and yellow aspens in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Great Sand Dunes and mountains with snow, Great Sand Dunes National Park and Preserve, Colorado, United States of America, North America
Colorado River from Dead Horse Point Overlook, Dead Horse Point State Park, Utah, United States of America, North America
Butter-and-eggs (common toadflax) (yellow toadflax) (Linaria vulgaris), San Juan National Forest, Colorado, United States of America, North America
Male red-winged blackbird (Agelaius phoeniceus) displaying, Pawnee National Grassland, Colorado, United States of America, North America
Aspens in the fall in fog, Grand Mesa National Forest, Colorado, United States of America, North America
The Civic Center and Rockies beyond, Denver, Colorado, USA
Hoover Dam on the Colorado River forming the border between Arizona and Nevada, United States of America, North America
Black Canyon of the Gunnison National Park, Gunnison River deep in the canyon, Colorado, United States of America, North America
Giant tortoise (Geochelone nigra) at the Galapaguera de Cerro Colorado, tortoise breeding center, Isla San Cristobal (San Cristobal Island), Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Snow-covered mountain in the Sneffels Range in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Mears Peak with snow and yellow aspens in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
The beautiful scenery of the Colorado River in the Grand Canyon at Nankoweap Point, Arizona, United States of America, North America
Colorado River Gooseneck Bend, Dead Horse Point State Park Overlook, Utah, United States of America, North America
Alpine avens (Acomastylis rossii turbinata) above the clouds, Mount Evans, Arapaho-Roosevelt National Forest, Colorado, United States of America, North America
Punta Colorado, Isla San Jose, Gulf of California (Sea of Cortez), Baja California Sur, Mexico, North America
Pink clouds at dawn reflected in a tarn near Stony Pass, San Juan National Forest, Colorado, United States of America, North America
Molas Lake, south of Silverton, Colorado, United States of America, North America
Heavy erosion, Los Colorados, Salta region, Argentina, South America
Los Colorados, Salta region, Argentina, South America
Hoover Dam on the Colorado River forming the border between Arizona and Nevada, United States of America, North America
Mountain goat (Oreamnos americanus) nanny and billy, Mount Evans, Colorado, United States of America, North America
Bull moose (Alces alces), Roosevelt National Forest, Colorado, United States of America, North America
Bull moose (Alces alces), Roosevelt National Forest, Colorado, United States of America, North America
Mountain Goat (Oreamnos americanus), Mount Evans, Colorado, United States of America, North America
Wilson Peak in the winter, Uncompahgre National Forest, Colorado, United States of America, North America
Wilson Peak at dawn with a dusting of snow in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Cascades on the Big Bear Creek in the fall, San Miguel County, Colorado, United States of America, North America
Great Sand Dunes late in the afternoon, Great Sand Dunes National Park and Preserve, Colorado, United States of America, North America
Great Sand Dunes and mountains with snow, Great Sand Dunes National Park and Preserve, Colorado, United States of America, North America
Cloud over the San Juan Mountains, San Juan National Forest, Colorado, United States of America, North America
Alpine tarn at dawn, San Juan National Forest, Colorado, United States of America, North America
Close-up of moss forms, San Juan National Forest, Colorado, United States of America, North America
Punta Colorado, Isla San Jose, Gulf of California (Sea of Cortez), Baja California Sur, Mexico, North America
Waterfall in an Alpine basin, San Juan National Forest, Colorado, United States of America, North America
Aspen trees on a snow-covered hillside, San Miguel County, Colorado, United States of America, North America
Snow-covered mountains covered with fog, Ouray County, Colorado, United States of America, North America
Molas Lake, south of Silverton, Colorado, United States of America, North America
Heavy erosion, Los Colorados, Salta region, Argentina, South America
Stream through marsh marigold or elk's lip (Caltha leptosepala) and Parry's primrose (Primula parryi), American Basin, Colorado, United States of America, North America
Wilson Peak in the winter at first light, Uncompahgre National Forest, Colorado, United States of America, North America
Lost Lake at dawn in the fall, Grand Mesa-Uncompahgre-Gunnison National Forest, Colorado, United States of America, North America
Yellow aspen leaf on a lichen-covered rock in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Yellow aspens among evergreens in the fall reflected in a lake, Uncompahgre National Forest, Colorado, United States of America, North America
State Capitol Rotunda, Denver, Colorado, United States of America, North America
Broncho Buster sculpture in the Civic Center Cultural Complex, Denver, Colorado, United States of America, North America
Horseshoe Bend on the Colorado River, Page, Arizona, United States of America, North America
The Crystal Mill, Marble, Colorado, United States of America, North America
Clouds reflected in a tarn at Stony Pass, San Juan National Forest, Colorado, United States of America, North America
Bighorn sheep (Ovis canadensis) ram, Clear Creek County, Colorado, United States of America, North America
The Civic Center and Rockies beyond, Denver, Colorado, USA
Mera Verde, Mesa Verde National Park, Colorado, USA, North America
Common snipe (Gallinago gallinago), Arapaho National Wildlife Refuge, Colorado, United States of America, North America
Yellow aspens among evergreens in the fall reflected in a lake, Uncompahgre National Forest, Colorado, United States of America, North America
Yellow aspens in the fall, San Miguel County, San Juan Mountains, Colorado, United States of America, North America
Daniel's and Fisher Tower, 16th Street Mall, Denver, Colorado, United States of America, North America
Larimer Square, Denver, Colorado, United States of America, North America
Denver Art Museum, Denver, Colorado, United States of America, North America
Navarre Building on Tremont Street, Denver, Colorado, United States of America, North America
Clouds at dawn reflected in an Alpine tarn, San Juan National Forest, Colorado, United States of America, North America
Kite Lake, Rio Grande National Forest, Colorado, United States of America, North America
First light at Clear Lake, San Juan National Forest, Colorado, United States of America, North America
Loggerhead shrike (Lanius ludovicianus), Pawnee National Grassland, Colorado, United States of America, North America
Yellow aspens, Colorado, USA, North America
Art Museum and Public Library, Denver, Colorado, USA