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Geothermal steam, frosted trees and snow-free hot ground in Norris Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Shafer Trail Road, Canyonlands National Park, Utah, United States of America, North America
Cliffs and hoodoos lit by late afternoon sun in winter, Paria View, Bryce Canyon National Park, Utah, United States of America, North America
Wall of Windows lit by early morning sun, silhouetted rock, Peekaboo Loop Trail, Bryce Canyon National Park, Utah, 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
Low clouds glowing orange at sunrise, Crater Lake National Park, Oregon, United States of America, North America
Bison, Theodore Roosevelt National Park North Unit, Watford, North Dakota, United States of America, North America
Line of Bison (Bison bison) crossing the Lamar River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grizzly Bear (Ursus arctos horribilis), Yellowstone National Park, Wyoming, United States of America, North America
Cinnamon Black Bear (Ursus americanus) yearling cub climbing a tree, Yellowstone National Park, Wyoming, United States of America, North America
View over the Shenandoah National Park with beautiful foliage in the Indian summer, Virginia, United States of America, North America
Bull elk, Cervus canadensis, with curious photographers, Yellowstone National Park, Wyoming, USA
Red fox (Vulpes vulpes) in the snow, Grand Teton National Park, Wyoming, United States of America, North America
Big horn sheep, Glacier National Park, Montana, United States of America, North America
Mesa Verde National Park, Cliff Palace, UNESCO World Heritage Site, Colorado, United States of America, North America
Bare tree among boulders at sunrise, Joshua Tree National Park, California, United States of America, North America
Chaco Culture National Historic Park, World Heritage Site, Fajada Butte, UNESCO World Heritage Site, New Mexico, United States of America, North America
Sunset above Yosemite Valley and Half Dome, viewed from Glacier Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Sandstone hoodoos in Bryce Amphitheater, sunrise with low mist, Bryce Canyon National Park, Utah, United States of America, North America
Mountains and a stream through the tundra in fall color, Denali National Park and Preserve, Alaska, United States of America, North America
Box elder (boxelder maple) (maple ash) (Acer negundo) with yellow leaves in the fall, Zion National Park, Utah, United States of America, North America
Sunset at Locust Point, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Female Williamson's sapsucker (Sphyrapicus thyroideus) at its nest hole, Yellowstone National Park, Wyoming, United States of America, North America
Chapel of the Transfiguration, Grand Teton National Park, Wyoming, United States of America, North America
Unicorn and Cathedral Peaks reflected in the Tuolumne River, Tuolumne Meadows, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
The Three Brothers mountains reflected in the tranquil waters of the River Merced, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Sunset above Half Dome, viewed from Olmsted Point, in autumn, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Star trails above Bryce Canyon National Park, Utah, United States of America, North America
Flooded meadow in Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Black tarmac road, Death Valley National Park, California, United States of America, North America
Adult black-legged kittiwakes (Rissa tridactyla), South Marble Islands, Glacier Bay National Park, Alaska, United States of America, North America
Crater Lake National Park, Oregon, USA
Elk, Yellowstone National Park, Wyoming, USA
View from Schwabacher's Landing across the Snake River to the Teton Range, Grand Teton National Park, Wyoming, United States of America, North America
Erupting geyser and Old Faithful Inn, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Crater Lake and Wizard Island at dawn, Crater Lake National Park, Oregon, United States of America, North America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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
Slump Block area in Theodore Roosevelt National Park North Unit, Watford, North Dakota, United States of America, North America
Pronghorn (Antilocapra americana) buck, Yellowstone National Park, Wyoming, United States of America, North America
Landscape, Mount Rainier National Park, Washington State, United States of America, North America
Gray wolf (Canis lupus) 755M of the Lamar Canyon Pack running through the snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Mesa Verde National Park, Spruce Tree House, UNESCO World Heritage Site, Colorado, United States of America, North America
Common raven (Corvus corax), Petrified Forest National Park, Arizona, United States of America, North America
Mirror Lake, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Hiker at Great Sand Dunes National Park, Colorado, United States of America, North America
Grizzly bear (Ursus arctos horribilis) sow and three cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
View from Cadillac Mountain, Acadia National Park, Mount Desert Island, Maine, New England, United States of America, North America
Grizzly bear (Ursus arctos horribilis) sow and yearling cub, Glacier National Park, Montana, United States of America, North America
Hoodoos, on the Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America
Blacktail prairie dog (Cynomys ludovicianus), Theodore Roosevelt National Park, North Dakota, United States of America, North America
Sunrise in the badlands, Theodore Roosevelt National Park, North Dakota, United States of America, North America
Bison (Bison bison) bull covered with snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Photographer at Tenaya Lake in Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Aura Borealis (Northern lights) in Denali Wilderness National Park, Alaska, United States of America, North America
Greater sage-grouse (Centrocercus urophasianus) in the snow, Grand Teton National Park, Wyoming, United States of America, North America
River Tuolumne adjacent to Yosemite National Park, California, United States of America, North America
Angels Landing and the Virgin River from in Zion Canyon, Zion National Park, Utah, United States of America, North America
Hiking the Pa'rus trail, Zion National Park, Utah, United States of America, North America
Sandstone formations, Bryce Canyon, Bryce Canyon National Park, Utah, United States of America, North America
Bison (Bison bison), Theodore Roosevelt National Park, North Dakota, United States of America, North America
Mesa Arch at sunrise, Canyonlands National Park, Utah, United States of America (U.S.A.), North America
Bryce Canyon National Park, Utah, United States of America, North America
Peekaboo Loop Trail sign with snow and rocks lit by early morning winter sun, Bryce Canyon National Park, Utah, United States of America, North America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
View down Zion Canyon from trail to Angels Landing at dawn, Zion National Park, Utah, United States of America, North America
Cinnamon black bear (Ursus americanus) hangs on a chokeberry branch in autumn (fall), Grand Teton National Park, Wyoming, 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
Desert Varnish on rocks, The Gorge, Capitol Reef National Park, Utah, United States of America, North America
Black Bear (Ursus americanus) cub of the year climbing a tree, Yellowstone National Park, Wyoming, United States of America, North America
Red Fox (Vulpes vulpes) (Vulpes fulva) vixen and two kits, Yellowstone National Park, Wyoming, United States of America, North America
Coyote (Canis latrans), Yellowstone National Park, Wyoming, United States of America, North America
Unicorn Peak reflected in the snow melt pools on Tuolumne Meadows, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Black bear (Ursus americanus) cub of the year or spring cub in a tree, Yellowstone National Park, Wyoming, United States of America, North America
Bighorn sheep (Ovis canadensis) ram eating in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Three bare trees on a hazy morning, Badlands National Park, South Dakota, United States of America, North America
Red Fox (Vulpes vulpes) (Vulpes fulva) in the snow, Grand Teton National Park, Wyoming, United States of America, North America
Red leaves on a big tooth maple branch in the fall, Zion National Park, Utah, United States of America, North America
Mesa Verde National Park, Cliff Palace, UNESCO World Heritage Site, Colorado, United States of America, North America
Chaco Culture National Historic Park, World Heritage Site, Pueblo Bonito, kiva (foreground), UNESCO World Heritage Site, New Mexico, United States of America, North America
Chaco Culture National Historic Park, World Heritage Site, Pueblo Bonito, kiva (foreground), UNESCO World Heritage Site, New Mexico, United States of America, North America
Chaco Culture National Historic Park, World Heritage Site, Pueblo Bonito, kiva (foreground), UNESCO World Heritage Site, New Mexico, United States of America, North America
Female mountain bluebird (Sialia currucoides) with an insect, Yellowstone National Park, Wyoming, United States of America, North America
Acadia National Park, Mount Desert Island, Maine, New England, United States of America, North America
View from Cadillac Mountain, Acadia National Park, Mount Desert Island, Maine, New England, United States of America, North America
Grand View Point overlook and juniper tree, Island in the Sky, Canyonlands National Park, Utah, United States of America, North America
Two girls with parasols in Burnt Forest, Yellowstone National Park, Wyoming, United States of America, North America
South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
River Otter (Lutra canadensis) on frozen Yellowstone Lake, Yellowstone National Park, Wyoming, United States of America, North America
Half Dome and the Merced River surrounded by fall foliage, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Blacktail prairie dog (Cynomys ludovicianus), Theodore Roosevelt National Park, North Dakota, United States of America, North America
Black bear (Ursus americanus) sow and three cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
Granite domes of Yosemite reflected in the calm waters of Tenaya Lake, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Yosemite Valley, with El Capitan and Bridal Veil Falls beneath a beautiful pink dawn sky, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Colourful sunrise above Yosemite Valley from Tunnel View, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Coyote (Canis latrans) in the snow in winter, Yellowstone National Park, Wyoming, United States of America, North America
Sunrise View Piont, Bryce National Park, Utah, United States of America, North America
Figure shows scale of the trunk of giant sequoia tree in the Giant Forest, Sequoia National Park, California, United States of America (U.S.A.), North America