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The Morning Glory Pool, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

The Morning Glory Pool, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Aspen trees in autumn colours, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Viewpoint looking north, Isla del Faro, Cies Islands, Atlantic Islands Galicia Maritime Terrestrial National Park, Galicia, Spain, Europe

Kayakers on the River Dart, Dartmoor National Park, near Ashburton, Devon, England, United Kingdom, Europe

Castle Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Eruption of Castle Geyser with thermophilic bacterica mats in foreground, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Grand Canyon, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Lake of the Clouds, Carlsbad Caverns National Park, UNESCO World Heritage Site, New Mexico, United States of America, North America

Looking west across Derwentwater to Cat Bells, Lake District National Park, Cumbria, England, United Kingdom, Europe

Second Beach, Olympic National Park, UNESCO World Heritage Site, Washington state, United States of America, North America

Bighorn sheep (Ovis canadensis) ram in the snow, Yellowstone National Park, Wyoming, United States of America, North America

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

Fly fisherman casting in the early morning fog in the Madison River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Close-up of the limestone terraces formed by volcanic water depositing six inches of calcium carbonate a year, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Fossil logs 200 million years old scattered over desert floor in National Park, Petrified Forest National Park, Arizona, United States of America (U.S.A.), North America

Elk (Cervus canadensis) with tourists along the Madison River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, 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

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

Bison walk through winter storm, Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America

Tourists viewing the Morning Glory Pool, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Blisters measuring about 10 cm across in boiling mud pool, Mud volcano, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Winter eruption, Old Faithful geyser, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Geysers in Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America

The Hayden Valley, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Geothermal steam from geyser vent between eruptions, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Beaver (Castor canadensis) feeding in Soda Butte Creek, Yellowstone National Park, Wyoming, United States of America, North America

Echinus Geyser, erupts every hour in Norris Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Close-up of the limestone terraces formed by volcanic water depositing six inches of calcium carbonate a year, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Travertine calcite deposits, Minerva Terrace, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Terraces, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (USA), North America

Hot water in pools on calcite terraces deposited by Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Anhinga trail, Everglades National Park, UNESCO World Heritage Site, Florida, United States of America (U.S.A.), North America

View from the Rim, Grand Canyon of the Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Morning Glory spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Crowds of spectators watching Old Faithful Geyser erupting, Upper 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

Travertine calcite deposits on the Canary Spring terraces, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Sunrise, Yellowstone Lake, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (USA), North America

Snowmobiling in the western area of Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America

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

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

North American black bear crossing road, Yellowstone National Park, Wyoming, United States of America, North America

Winter in Midway basin, buffalo beside Firehole river, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Minerva Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (USA), North America

Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

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

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

Steam from hot springs and snow-free hot ground in Midway Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

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

Buffalo beside Firehole River in winter in Midway geothermal basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Geysers in Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America

Mud Cauldron, Mud Volcano area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

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

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

Fishing Bridge region, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Grand Canyon, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Main terrace, Mammmoth Hot Springs area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Swimming Buffalos in the Yellowstone River, Bos bison; American Buffalo; American Bison; Swimming The Yellowstone River; Yellowstone National Park; Wyoming

Antelope With Buffalo, Antilocapra americana; Pronhorn; Antelope; Bos bison; American Buffalo; Bison; Yellowstone National Park; Wyoming; Winter

Duck For Lunch, Lontra canadensis; River Otter; Otters near the water; Otters with a duck to eat; Yellowstone Otters, Yellowstone River; Yellowstone National Park; Winter; Wyoming;

Coyote Laying In The Snow, Canis latrans; Coyote; Coyote in snow; Yellowstone National Park; Winter; Wyoming

Yellow_Bellied Marmot Portrait, Marmota flaviventris; Yellow-bellied Marmot; Yellowstone National Park; Wyoming

Red Fox In THe Snow, Vulpes vulpes; Red Fox; Red Fox in snow; Winter; Yellowstone National Park; Wyoming

Adult trumpeter swans (Cygnus buccinator) on the Yellowstone River in Yellowstone National Park, Wyoming, USA.

Buffalo laying near steam vent, Bos bison; American Buffalo; American Bison; Yellowstone National Park; Wyoming

Adult trumpeter swans (Cygnus buccinator) on the Yellowstone River in Yellowstone National Park, Wyoming, USA.

Pair Of Otters, Lontra canadensis; River Otter; Otters near the water; Yellowstone Otters, Yellowstone River; Yellowstone National Park; Winter; Wyoming;

Adult trumpeter swans (Cygnus buccinator) on frozen Swan Lake in Yellowstone National Park, Wyoming, USA.

A family of river otters (Lontra canadensis) foraging in the Yellowstone River in Hayden Valley in Yellowstone National Park, Wyoming

Adult Tufted Puffin (Fratercula cirrhata) in flight near the South Marble Island Group in Glacier Bay National Park, Southeastern Alaska, USA

Adult Rocky Mountain bighorn sheep (Ovis canadensis canadensis) just outside the boundry of Yellowstone National Park near Gardiner, Montana

A family of river otters (Lontra canadensis) foraging in the Yellowstone River in Hayden Valley in Yellowstone National Park, Wyoming

Adult Rocky Mountain bighorn sheep (Ovis canadensis canadensis) just outside the boundry of Yellowstone National Park near Gardiner, Montana