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Palette Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Mound Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Ephedra spring, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Cloud over the San Juan Mountains, San Juan National Forest, Colorado, United States of America, North America

Canoeing across Bowman Lake, Glacier National Park, Montana, United States of America, North America

Bison (Bison bison) bull, Yellowstone National Park, Wyoming, United States of America, North America

Waterfall in an Alpine basin, San Juan National Forest, Colorado, United States of America, North America

Pine tree on the exposed granite rock at Sentinel Dome, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Seasonal ponds on Tuolumne Meadows in Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

The Three Brothers reflected in the River Merced, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Guadalupe Peak and El Capitan at dusk, Guadalupe Mountains National Park, Texas, United States of America, North America

Sandhill crane (Grus canadensis), Yellowstone National Park, Wyoming, United States of America, North America

Grizzly Bear (Ursus arctos horribilis) walking, Yellowstone National Park, Wyoming, United States of America, North America

Fog among the mountains and evergreens, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Clouds reflected in a pond, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Yosemite Valley, with evening light bathing Half Dome and El Capitan, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Colourful sunset skies above the snow dusted mountains of Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Yosemite Falls reflected in a flooded Cooks Meadow, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

El Capitan reflected in a flood pool, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Yosemite Falls, reflected in a meadow flood pool, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Reflection of the Teton range, Bradley Lake, Grand Teton National Park, Wyoming, United States of America, North America

Beauty Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Ice encrusted dead trees against clear skies, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Oklahoma City National Memorial and Museum, Oklahoma City, Oklahoma, United States of America, North America

Everglades National Park, UNESCO World Heritage Site, Florida, United States of America, North America

Spotted Sandpiper (Actitis macularia), Yellowstone National Park, Wyoming, United States of America, North America

Fort Union National Monument and Santa Fe National Historic Trail, New Mexico, United States of America, North America

Saguaro cacti, Saguaro National Park, Tuscon Mountain District west unit, Tucson, Arizona, United States of America, North America

Coyote (Canis latrans) in snow, Yellowstone National Park, Wyoming, United States of America, North America

Tetons at dawn in the winter, Grand Teton National Park, Wyoming, United States of America, North America

Northern (Steller) sea lions (Eumetopias jubatus), South Marble Island, Glacier Bay National Park, Southeastern Alaska, United States of America, North America

Chaco Culture National Historic Park, World Heritage Site, Hungo Pavi, UNESCO World Heritage Site, New Mexico, 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

Court of the Patriarchs, Abraham Peak, Isaac Peak, Mount Moroni and Jacob Peak, Zion National Park, Utah, United States of America, North America

Thor's Hammer in early morning from Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America

Lower Falls from Artists Point, Grand Canyon of the Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Minerva Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

View of Lower Falls from Red Rock Point, Grand Canyon of the Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Blue Funnel spring, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Tourists looking at Seismograph and Bluebell pools, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Hoodoos, on the Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Mount Grinnell and Swiftcurrent Lake at dawn, Glacier National Park, Montana, United States of America, North America

Mirror Lake in Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Pueblo Mission in background), Kiva in foreground, Pecos National Historic Park, New Mexico, United States of America, North America

Red and white sandstone layers with colorful clouds at sunrise, Valley Of Fire State Park, Nevada, United States of America, North America

Female Williamson's sapsucker (Sphyrapicus thyroideus) on a feeding tree, Yellowstone National Park, Wyoming, United States of America, North America

Aspens in the fall in fog, Grand Mesa National Forest, Colorado, United States of America, North America

Mammoth Hot Springs terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Lower Falls, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Yellowstone River near Calcite Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Yellowstone River near Calcite Springs, Yellowstone National Park, UNESCO Wortld Heritage Site, Wyoming, United States of America, North America

Pink clouds over snow-covered hills at sunset, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Blue holes and white crystals, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Moss covered maple trees, Dosewallips campground, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America (U.S.A.), North America

Castle Geyser at sunset, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Oklahoma City National Memorial and Museum, Oklahoma City, Oklahoma, United States of America, North America

Pueblo Bonito Chaco Culture National Historical Park scenery, New Mexico, United States of America, North America

Five Faces Pictograph, Anthropomorph images 700 to 1000 years old, Davis Canyon, Canyonlands National Park, Utah, United States of America, North America

Northern (Steller) sea lions (Eumetopias jubatus), South Marble Island, Glacier Bay National Park, Southeastern Alaska, United States of America, North America

Chaco Culture National Historic Park, World Heritage Site, Casa Rinconada, UNESCO World Heritage Site, New Mexico, United States of America, North America

Artemesia Geyser Pool, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, 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

Badlands with maroon color, Capitol Reef National Park, Utah, United States of America, North America

Rippled gypsum, sand dunes in the White Sands National Monument, New Mexico, United States of America, North America

Beautiful rock formations in the Needles, Canyonlands 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

Mount Washburn in early morning light, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Palette Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Old Faithful Geyser erupting, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Madison River valley near Madison, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Desert View Watchtower, South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The Three Gossips and The Courthouse Towers rock formations, Arches National Park, near Moab, Utah, 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

Cinnamon black bear (Ursus americanus), Glacier National Park, Montana, United States of America, North America

Black bear (Ursus americanus) eating, Yellowstone National Park, Wyoming, United States of America, North America

Mirror Lake in Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Yosemite Falls reflected in the Merced River at dawn, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Yosemite Falls photographed from Taft Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Tranquil Tenaya Lake alongside the Tioga Pass, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Pyrrhuloxia (Cardinalis sinuatus) female, Chiricahuas, Coronado National Forest, Arizona, United States of America, North America