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Jackson Lake, Colter Bay, Grand Teton National Park, Wyoming, USA
Morning Glory Pool, a geothermal pool, colours are due to algae at temperature bands, hotter below, Yellowstone National Park, Wyoming, USA
Waterfall in the Grand Canyon, Yellowstone National Park, Wyoming, USA
Bison grazing in Yellowstone National Park, Wyoming, USA
Coyote (Canis latrans), weighing 30-40 lbs, less than half the weight of a wolf, Yellowstone National Park, Wyoming, USA
Bull moose beside Yellowstone Lake, Yellowstone National Park, Wyoming, USA, North America
Black bear (Ursus americanus) sow nursing a spring cub, Yellowstone National Park, Wyoming, United States of America, North America
Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Mormon Row Barn and a bison off Antelope Flats Road, Jackson Hole, Grand Teton National Park, Wyoming, United States of America, North America
Two bison (Bison bison) bulls facing off, Yellowstone National Park, Wyoming, United States of America, North America
Walkway, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Elk herd, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Aerial view of the Snake River, Wyoming, United States of America, North America
Bison, Yellowstone National Park, Wyoming, USA
Oxbow Bend, Snake River and Tetons, Grand Tetons National Park, Wyoming, USA
Castle Geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Tetons and Jenny Lake, Grand Teton National Park, Wyoming, USA
Elk, Yellowstone National Park, Wyoming, USA
Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Dead tree trunks, Canary Spring, top Main Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
The Moulton Barn on Mormon Row with the Grand Tetons range in background, Antelope Flats Road, Grand Teton National Park, Wyoming, United States of America, North America
Sunset over a warm river in winter, Yellowstone National Park, Wyoming, USA
Derelict barn in wheat field, Northern Wyoming, United States of America, North America
Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Mud Volcano Area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Black bear (Ursus americanus) sow, Yellowstone National Park, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Excelsior Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone River in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Ruins of gas station, Pinedale, Wyoming, United States of America, North America
Sapphire Pool, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
The Cathedral Group of Mount Teewinot, Mount Owen and Grand Teton from the Snake River at Schwabacher's Landing, Grand Teton National Park, Wyoming, United States of America, North America
Yellowstone River in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Castle Geyser, Yellowstone National Park, Wyoming, USA
Lower Falls, Grand Canyon, Yellowstone National Park, Wyoming, USA
Moulton Ranch, Grand Teton National Park, Wyoming, United States of America (U.S.A.), North America
Crested Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Tourists on boardwalk over the mineral runoff from Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Echinus Geyser, erupts every hour, Norris Basin, Yellowstone National Park, Wyoming, USA
Dead tree trunks, Canary Spring, top Main Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Dead tree trunks, Canary Spring, Main Terrace, Mammoth Hot Springs, Yellowstone National Park, UENSCO World Heritage Site, Wyoming, United States of America, North America
Bull elk (Cervus canadensis) in the snow, National Elk Refuge, Jackson, Wyoming, United States of America, North America
Wooden boardwalk and cyanobacteria thermophile formations on Geyser Hill, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Little Bear Creek cascade at sunrise, Shoshone National Forest, Wyoming, United States of America, North America
Devil's Tower, Devil's Tower National Monument, Wyoming, United States of America, North America
Grand Geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Devil's Tower, Devil's Tower National Monument, Wyoming, United States of America, North America
Eruption of Castle Geyser with rainbow in the spray, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Devils Tower National Monument, Wyoming, United States of America, North America
Wild blue flax (Linus perenne lewisii), Grand Teton National Park, Wyoming, United States of America, North America
Minerva Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Castle Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Tourists on boardwalk over the mineral runoff from Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone River in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Coyote (Canis latrans) in snow, Yellowstone National Park, Wyoming, United States of America, North America
Grand Geyser erupting over sinter terrace, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
The Cathedral Group of Mount Teewinot, Mount Owen and Grand Teton reflected in the Snake River, Schwabacher's Landing, Grand Teton National Park, Wyoming, United States of America, North America
Tourists on the boardwalk around the Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Beaver (Castor canadensis) feeding in Soda Butte Creek, Yellowstone National Park, Wyoming, United States of America, North America
Castle Geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bison, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Excelsior Geyser Crater. Yellowstone National Park, Wyoming, USA, North America
Grand Prismatic Spring and Excelsior Pool behind, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bull elk near Firehole River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
The Cathedral Group of Mount Teewinot, Mount Owen and Grand Teton from the Snake River at Schwabacher's Landing, Grand Teton National Park, Wyoming, United States of America, North America
The Cathedral Group of Mount Teewinot, Mount Owen and Grand Teton reflected in the Beaver Pond, Schwabacher's Landing, Grand Teton National Park, Wyoming, United States of America, North America
Old Faithful geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Tetons with first light in the valley with snow, Grand Teton National Park, Wyoming, United States of America, North America
Liberty Cap, Mammoth Hot Springs, Yellowstone National Par, UNESCO World Heritage Site, Wyoming, United States of America, North America
Whirligig Geyser runoff, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Old Faithful geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
The Cathedral Group of Mount Teewinot, Mount Owen and Grand Teton reflected in the Snake River, Schwabacher's Landing, Grand Teton National Park, Wyoming, United States of America, North America
Golden Gate Canyon, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Lower Falls on the Yellowstone River, Grand Canyon of the Yellowstone, from Lookout Point, North Rim, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Dead tree trunks in hot spring area of the Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bison, Yellowstone Lake area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Elk, Yellowstone National Park, Wyoming, United States of America, North America
Whirligig Geyser runoff, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Wooden boardwalk over the mineral sinter formations on Geyser Hill, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Eruption of Castle Geyser with rainbow in the spray, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Harebell (Campanula rotundifolia), Grand Teton National Park, Wyoming, United States of America, North America
Emblem, Wyoming, United States of America, North America
Dead trees at the top of Canary Spring, Main Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone National Park area in winter, Wyoming, United States of America, North America
Male elk (Cervus canadensis), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bighorn Mountains, Wyoming, United States of America, North America
Chief Joseph Scenic Byway, Wyoming, United States of America, North America
Elk, Firehole River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowbelly marmot (Marmota flaviventris), Shoshone National Forest, Wyoming, United States of America, North America
Dead lodgepole pine trunks, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Light dusting of snow on the pines around the Virginia Cascades, Norris to Canyon Road, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Canary Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Canary Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Blue Star Spring, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Two Richardson ground squirrel (Citellus richardsoni), Grand Teton National Park, Wyoming, United States of America, North America