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Adult male plateau fence lizard (Sceloporus tristichus), north rim of Grand Canyon National Park, Arizona, United States of America, North America

Grand Canyon viewed from a cliff overlooking Papago Creek, with Papago Point just right of center, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A view of the upper Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

An adult desert collared lizard (Crotaphytus bicinctores), basking in Grand Canyon National Park, Arizona, United States of America, North America

A view of Margerie Glacier in the Fair-weather Range, Glacier Bay National Park, Southeast Alaska, USA.

Flight seeing from Haines over the Fair-weather Range in Glacier Bay National Park, Southeast Alaska, USA.

Snowy cliffs from Peekaboo Loop Trail, Bryce Canyon National Park, Utah, United States of America, North America

Rim edge, pine trees and snowy cliffs lit by morning sun with cloudy sky, Rainbow Point, Bryce Canyon National Park, Utah, United States of America, North America

Gros Ventre River with snow, ice, and fog, Grand Teton National Park, Wyoming, United States of America, North America

Grand Canyon view from Moran Point on a cloudy day with the clouds floating inside the canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, 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

Snow-covered mountains in the spring from Trail Ridge Road, Rocky Mountain National Park, Colorado, United States of America, North America

Looking north from Dante's View in Death Valley National Park, California, United States of America, North America

A view of Zabriskie Point at sunset, Amargosa Range, Death Valley National Park, California, United States of America, North America

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

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

Half Dome from Glacier Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Grizzly bear (Ursus arctos horribilis), Glacier National Park, Montana, United States of America, North America

Red sky over St. Mary Lake at sunrise, Glacier National Park, Montana, United States of America, North America

Pool of water at Badwater, Death Valley National Park, California, United States of America, North America

View of The Amphitheater from the Navajo Loop Trail in Bryce Canyon National Park, Utah, United States of America, North America

A sedimentary Pipe, Angel's Palace trail, Kodachrome Basin State Park, Grand Staircase-Escalante National Monument, Kane County, Utah, United States of America, North America

An adult humpback whale (Megaptera novaeangliae) breaching in Kenai Fjords National Park, Alaska, United States of America, North America

The Racetrack, a playa or dried up lakebed, in Death Valley National Park, California, United States of America, North America

Historic Interdenominational Chapel (Yosemite Community church), Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, Sierra Nevada, California, United States of America, North America

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

Narada Falls, Mount Rainier National Park, Washington State, United States of America, North America

The colourful sandstone formations of the Bryce Canyon National Park in the late afternoon, Utah, United States of America, North America

Walkway through cold lava in the Craters of the Moon National Park, Idaho, United States of America, North America

View of Hermit Canyon from the east side of Yuma Point at Grand Canyon Arizona along the Boucher Trail with Pima Point on the upper right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of Yuma Point from Hermit Trail in winter at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Granite mountains at sunset, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Half Dome viewed from Glacier Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Schwabacher landing, Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

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

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

An adult humpback whale (Megaptera novaeangliae) head-lunging in Kenai Fjords National Park, Alaska, United States of America, North America

Grand Canyon viewed from the cliffs east of Moran Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Hiking to the Puebloan granaries at Upper Nankoweap, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Whitmore Canyon from the helicopter, just before river mile 187, Grand Canyon National Park, Arizona, United States of America, North America

Night photography at South Canyon, just before river mile 32, Grand Canyon National Park, Arizona, United States of America, North America

Flight seeing from Haines over the Fair-weather Range in Glacier Bay National Park, Southeast Alaska, USA.

Olmsted Point with distant view of Half Dome rock formation, Yosemite National Park, California, USA

Red rock formations known as hoodoos in Bryce Canyon National Park, Utah, United States of America, North America

A waterfall running through the Mossy Cave Trail in Bryce Canyon National Park, Utah, United States of America, North America

Rock face and waterfalls, Emerald Pools, Zion National Park, Utah, United States of America, North America

Rim cliffs and hoodoos lit by late afternoon sun in winter, Paria View, Bryce Canyon National Park, Utah, United States of America, North America

Rocks lit by late afternoon sun with distant view in winter, Paria View, Bryce Canyon National Park, Utah, United States of America, North America

Late afternoon sun lights lines of hoodoos at Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America

Late afternoon sun lights hoodoos and cliffs with a cloudy sky in winter, near Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America

Sand dunes with grasses and ridges in foreground, Great Sand Dunes National Park, Colorado, United States of America, North America

Sand dunes at dawn, Great Sand Dunes National Park, Colorado, United States of America, North America

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

Mesa Arch at sunrise, Canyonlands National Park, Island In The Sky District, Utah, United States of America, North America

The Needles in Chesler Park, Canyonlands National Park, Utah, 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

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

Looking north from Dante's View in Death Valley National Park, California, United States of America, North America

Two Richardson Ground Squirrel (Citellus richardsoni), Grand Teton National Park, Wyoming, United States of America, North America

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

Red sandstone cliffs in the Capitol Reef National Park, Utah, United States of America, North America

Cold lava walls in the Craters of the Moon National Park, Idaho, United States of America, North America

Juniper at sunset at Keys View, Joshua Tree National Park, California, United States of America, North America

Hoary marmot (Marmota caligata), Glacier National Park, Montana, United States of America, North America

The Wooden Shoe rock formation and stemless woollybase (Hymenoxys acaulis) at sunset, The Needles District, Canyonlands National Park, Utah, United States of America, North America

Forest trail, Sleeping Bear Dunes National Park, Glen Arbor, Michigan, United States of America, North America

Walkway through cold lava in the Craters of the Moon National Park, Idaho, United States of America, North America

Beautiful red sandstone formations in the Arches National Park, Utah, United States of America, North America

View over the towering cliffs of the Zion National Park, Utah, United States of America, North America

Jackson Lake in the Teton range in the Grand Teton National Park, Wyoming, United States of America, North America

A forest fire destroys an area of forest in Yosemite Valley in the Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

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

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