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Cascades on the Virgin River in the fall, Zion National Park, Utah, United States of America, North America

Rock Squirrel (Spermophilus variegatus), Zion National Park, Utah, United States of America, North America

Salt pan polygons at Badwater Basin, 282ft below sea level and the lowest place in North America, Death Valley National Park, California, United States of America, North America

Red squirrel (spruce squirrel) (Tamiasciurus hudsonicus) in a spruce tree, Denali National Park and Preserve, Alaska, United States of America, North America

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

Ubehebe Crater, a volcanic crater half a mile across and 600 feet deep, Death Valley National Park, California, United States of America, North America

A petrified log called the Agate Bridge in Petrified Forest National Park, Arizona, United States of America, North America

A petrified log called the Agate Bridge in Petrified Forest National Park, Arizona, United States of America, North America

Pronghorn (Antilocapra americana) in the snow, Grand Teton National Park, Wyoming, United States of America, North America

Small American black bear (Ursus americanus) with rare white chest markings, on the Big Trees trail, Round Meadow, Sequoia National Park, Sierra Nevada, California, United States of America, North America

The Transept Trail sign where it branches off from the Bright Angel Point Trail on the North Rim of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Fiery Furnace, a maze like passageway, Arches National Park, Utah, United States of America, North America

View over the cliffs of the Zion National Park and the Angel's Landing path, Zion National Park, Utah, United States of America, North America

Clouds reflecting in the water at Jersey Cove, Cape Breton Highlands National Park, Cape Breton Island, Nova Scotia, Canada, North America

Granite mountains with Half Dome in the background, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

View over Yosemite National Park with Half Dome, UNESCO World Heritage Site, California, United States of America, North America

Adult brown bears (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

An adult brown bear (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

Early morning, Teton Range from Schwabache Landing, Grand Teton National Park, Wyoming, United States of America, North America

Mormon Row and Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

Mormon Row and Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

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

Tunnel View, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Snow-capped mountains reflected in the calm waters of Phelps Lake, Grand Teton National Park, Wyoming, United States of America, North America

A winter sunrise view of Grand Canyon Arizona from Bright Angel Trail on the South Rim just past the second tunnel, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

An adult pigeon guillemot (Cepphus columba) taking flight with a fish in Geographic Bay, Katmai National Park, Alaska, United States of America, North America

Salt covered hills of Bentonite in the Petrified Forest National Park along the Blue Forest Trail, Arizona, United States of America, North America

A mother brown bear (Ursus arctos) with her cubs on the beach in Lake Clark National Park and Preserve, Alaska, United States of America, North America

Mounds of a volcanic clay called Bentonite in the Petrified Forest National Park, Arizona, United States of America, North America

Early light on Mount Rainier from the Burroughs Mountain Trail, Mount Rainier National Park, Washington State, United States of America, North America

Views of the Nisqually Glacier from the Skyline Trail, Mount Rainier National Park, Washington State, United States of America, North America

An adult bald eagle (Haliaeetus leucocephalus) taking flight from a rock, Kenai Fjords National Park, Alaska, United States of America, North America

Panorama of a valley that is the Gateway to the Devil's Playground in Petrified Forest National Park, Arizona, United States of America, North America

Panorama view of Grand Canyon from the bow of the Sinking Ship rock formation, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Large pieces of petrified wood on the west side of Red Basin in Petrified Forest National Park Arizona, United States of America, North America

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

An adult female willow ptarmigan (Lagopus lagopus) in the shrubs in Denali National Park, Alaska, United States of America, North America

A hoodoo formation called Medusa's Child below the cliffs of Agate Plateau in Petrified Forest National Park, Arizona, United States of America, North America

North Rim of Grand Canyon in the distance viewed from west of Pinal Point on the South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A view of the Bryce amphitheater from the rim at Bryce Canyon National Park, Utah, United States of America, North America

Virgin River und Angel's Landing, Zion National Park, Colorado Plateau, Utah, United States of America, North America

Grand Canyon viewed from No Name Point halfway between Lipan Point and Pinal Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View from Lacey Point in Petrified Forest National Park, Arizona, United States of America, North America

Loki's Rock at Grand Canyon east of Thor's Hammer Overlook, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A rock spire separate from the cliff wall west of Zuni Point at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon viewed just east of Zuni Point on a stormy day, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

An adult Mexican jay (Aphelocoma wollweberi), Big Bend National Park, Texas, United States of America, North America

Entrance to the main cave at Carlsbad Caverns National Park, UNESCO World Heritage Site, located in the Guadalupe Mountains, New Mexico, United States of America, North America

Sequoia trees in the Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Grand Canyon viewed east of Pima Point with Mohave Point on the right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon viewed from Powell Point under moonlight, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Prismatic Spring and bacterial mats, Midway Geyser Basin, Yellowstone National Park, Teton County, Wyoming, United States of America, North America

Virgin River flowing through Court of the Patriarchs, Zion National Park, Utah, United States of America, North America

Bryce Canyon from Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America

An adult pronghorn (Antilocapra americana), in sagebrush in Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

A woman strolls along the ridge of a pure white sand dune in White Sands National Park, New Mexico, United States of America, North America

Chesler Park, The Needles section of Canyonlands National Park, Utah, United States of America, North America

Spruce Tree House Ruins, Pueblo ruins in Mesa Verde containing some of the most elaborte Pueblo dwellings found today, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

Snowscape with stream and trees, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Frozen bison crossing a stream, 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

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

Tree clinging to rock at sunrise, Bryce Canyon National Park, Utah, United States of America, North America

Two river otters (Lontra canadensis), running on snow and ice, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

River Otter (Lutra canadensis), Yellowstone National Park, Wyoming, United States of America, North America

View over valley with colourful foliage in the Indian summer, Great Smoky Mountains National Park, UNESCO World Heritage Site, Tennessee, United States of America, North America

Wildrose Charcoal Kilns, built in 1877 to produce charcoal for the mines, Death Valley National Park, California, United States of America, North America

Close up view of canyon through Mesa Arch with glowing arch, Canyonlands National Park, Utah, United States of America, North America

Bison (Bison bison), with long shadows and footprints in Lamar Valley, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Snowscape of winding river and trees, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Green heron (Butorides virescens), perching over water beside the Anhinga Trail, Everglades National Park, Florida, United States of America, North America

Rock formation and common paintbrush (Castilleja chromosa), Arches National Park, Utah, United States of America, North America

The Castle and Fremont River, Capitol Reef National Park, Utah, United States of America, North America

Cascade and tree in the fall, The Narrows of the Virgin River, Zion National Park, Utah, United States of America, North America

View from the summit of Squared Off Butte along the Onyx Trail in Petrified Forest National Park, Arizona, United States of America, North America

Beaver (Castor canadensis) swimming, Denali National Park and Preserve, Alaska, United States of America, North America

Mount McKinley in the fall, Denali National Park and Preserve, Alaska, United States of America, North America

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

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear) cub, Katmai National Park and Preserve, Alaska, United States of America, North America

The Giant Petrified Logs of Petrified Forest National Park, located along a trail behind the Rainbow Museum, Arizona, United States of America, North America

Aerial view of sunrise over Mount Rainier National Park, Washington State, United States of America, North America

Starry sky viewed through Broken Arch, Arches National Park, Utah, United States of America, North America

View of Grand Canyon from the south cliffs of Cape Final on the North Rim with Unkar Creek below and right of centre the pointed peak of Freya's Castle, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The trail junction for the Ken Patrick Trail and Uncle Jim Trail at Grand Canyon North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America