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A purple canyon with a dry creek in between hills of bentonite in Petrified Forest National Park, Arizona, United States of America, North America

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

Snowy cliffs of the rim lit by weak winter's late afternoon sun, Bryce Point, Bryce Canyon National Park, Utah, United States of America, North America

Mesa Top Loop Road 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

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

Old Faithful geyser erupting, 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 reflected in the Snake River, Schwabacher's Landing, Grand Teton National Park, Wyoming, United States of America, North America

Morning Glory pool hot spring in the snow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Lone tree in snow dune, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

The swirl of stars in the night sky over Grand Canyon South Rim viewed from Moran Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The Salt Flats of Badwater Basin, the lowest point in North America, Death Valley National Park, California, United States of America, North America

Peoples at Delicate Arch at golden hour, Arches National Park, Moab, Grand County, Utah, United States of America, North America

Winter scene in the Badlands, Badlands National Park, South Dakota, United States of America, North America

Close up view of canyon through Mesa Arch at sunrise, Canyonlands National Park, Utah, United States of America, North America

American alligator (Alligator mississippiensis), at rest beside the Anhinga Trail, Everglades National Park, Florida, United States of America, North America

Cinnamon black bear (Ursus americanus) yearling cub, Yellowstone National Park, Wyoming, United States of America, North America

Sunrise at Mesa Arch with sunburst, Canyonlands National Park, Utah, United States of America, North America

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

Yellow maple against a red rock canyon wall in the fall, Zion National Park, Utah, United States of America, North America

Grand Canyon view from the east side of Skeleton Point along the South Kaibab Trail, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Looking down into Ubehebe crater, a Maar volcano, caused by groundwater contacting hot magma or lava, Death Valley National Park, California, United States of America, North America

Elk (Cervus canadensis) crossing the Madison River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Gallatin Range and Swan Lake Flats, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Grizzly bear (Ursus arctos horribilis) (Coastal brown bear) sow and spring cub walking along a stream, Katmai National Park and Preserve, Alaska, United States of America, North America

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

Misty dawn over Hayden Valley, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, 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

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

Surroundings of Pinnacles National Park and empty road, California, United States of America, North America

Sandstone towers along Park Avenue canyon, Arches National Park, Moab, Utah, United States of America, North America

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

Pretty scenic views in Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

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

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

Northern view of the Grand Canyon from Papago Point on the south rim, the rock on the left is Hollenback Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A mother brown bear (Ursus arctos), feeding on clams in Geographic Harbor, Katmai National Park, Alaska, United States of America, North America

75 Mile Creek from the Tanner Trail in the Grand Canyon, with Lipan Point on the upper left and Escalante Butte on the upper right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Wizard Island in Crater Lake, the deepest lake in the United States, Crater Lake National Park, Oregon, United States of America, North America

Roosevelt Elk at Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Floating in a raft on the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Curious Steller sea lions (Eumetopias jubatus), South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

An adult sea otter (Enhydra lutris), swimming in Glacier Bay National Park, Southeast Alaska, United States of America, North America

The Bow Rock of the formation called Sinking Ship in Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Natural stone bridge of petrified wood called Keystone Bridge, located on Blue Mesa in Petrified Forest National Park, Arizona, United States of America, North America

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

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

Grand Canyon view north of Point Imperial with Woolsey Butte on the left and Mount Hayden on the right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Steamboat Geyser, the worlds tallest active geyser, steaming in Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Riverside Walk, Temple of Sinawava, Zion National Park, Colorado Plateau, Utah, United States of America, North America

Pink sunset sky above Yosemite Valley from Glacier Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Commercial dory runs the Deubendorff Rapid, just past river mile 132, 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

The Desert View Watchtower at Grand Canyon viewed from below the cliffs east of Navajo Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

An adult Scotts oriole (Icterus parisorum), Big Bend National Park, Texas, United States of America, North America

Fisheye view of a dry waterfall where the Hance Creek drains into Hance Canyon at Grand Canyon South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Two of three ponds called the Hearst Tanks, on Grand Canyon South Rim, located one mile east of Grandview Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Immature little blue heron (Egretta caerulea), Everglades National Park, Florida, United States of America, North America

Tetons with first light in the valley with snow, Grand Teton National Park, Wyoming, United States of America, North America

John Muir, Yosemite National Park, UNESCO World Heritage Site, California, 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

A rocky peninsula off the cliffs of Grandview Point at Grand Canyon South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

An adult North American beaver (Castor canadensis) along the shore in Grand Teton National Park, Wyoming, United States of America, North America

Margerie Glacier in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Woman looking over Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Adult anhinga (Anhinga anhinga), in Shark Valley, Everglades National Park, Florida, United States of America, North America

Reflection of Half Dome Peak in the Merced River, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, 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

Morning light over snow covered trees, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Dead tree trunks in hot spring area of the Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Man gazing out at the view in White Sands National Park, New Mexico, United States of America, North America

Jumping off a sand dune in White Sands National Park, New Mexico, United States of America, North America

A view of Margerie Glacier against the Fairweather Range in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Alaska, United States of America, North America

Bull moose (Alces alces) close up in laughing pose, Grand Teton National Park, Wyoming, United States of America, North America

Pronghorn antelope (Antilocapra americana) in golden grass, Grand Teton National Park, Wyoming, United States of America, North America

Hance Creek between Sinking Ship on the left and Coronado Butte right of center right at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

First light on Teton Range at Moulton Barn in the snow, Grand Teton National Park, Wyoming, United States of America, North America