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A valley in Petrified Forest National Park, west of the Tepees, Arizona, United States of America, North America

A valley in Petrified Forest National Park, west of the Tepees, Arizona, United States of America, North America

Ancient Indian petroglyphs along the Onyx Trail at Petrified Forest National Park, Arizona, United States of America, North America

Grand Canyon view from cliffs east of the Desert View Point, with Cedar Mountain in the distance on the right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Zuni Point at Grand Canyon South Rim in the clouds viewed from Moran Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Colorado River dividing California and Arizona, near Parker, Arizona, United States of America, North America

Hoover Dam on the Colorado River forming the border between Arizona and Nevada, United States of America, North America

Pictographs, Palatki Heritage Site, Coconino National Forest, Arizona, United States of America, North America

The paved pathway between Bright Angel Point and the visitor center at Grand Canyon North Rim at twilight, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Desert view point over the Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Rock formations in the late daylight near Monument Valley, Arizona, United States of America, North America

Sandstone formations with clouds, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Saguaro cactus (Carnegiea gigantea), photographed at night in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America

An adult male acorn woodpecker (Melanerpes formicivorous), Madera Canyon, southern Arizona, Arizona, United States of America, North America

Sky Walk over the Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America

The cliffs of Bright Angel Canyon along the Bright Angel Trail in winter at sunrise on the South Rim of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Hikers in Marble Canyon along the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Floating down the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View from Cape Royal Point of the north rim of Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the North Rim of Grand Canyon National Park from Bright Angel Point, UNESCO World Heritage Site, Arizona, United States of America, North America

Afternoon view from the Spectator Area on Mingus Mountain near Jerome, Arizona, United States of America, North America

View from Grandview Point, South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View from Cape Royal at sunrise, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Giant petrified logs on the Purple Peninsula in Petrified Forest National Park, Arizona, United States of America, North America

An area south of the Tepees in Petrified Forest National Park known as the Little Tepees, Arizona, United States of America, North America

An area south of the Tepees in Petrified Forest National Park known as the Little Tepees, Arizona, United States of America, North America

An adult female Costa's hummingbird (Calypte costae) feeding in Madera Canyon, southern Arizona, 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

Night photography at Blacktail Canyon, just before river mile 121, Grand Canyon National Park, 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

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

Caves in the cliff walls, used to store food by ancient Anasazi Indians, Canyon De Chelly National Monument, Arizona, United States of America, North America

Panorama view of the Junction between the north and south forks of Canyon De Chelly National Monument, with Dog Rock rock formation on the far left, Arizona, United States of America, North America

Grand Canyon viewed through a rock cave below Lipan Point on the South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The safety railed stone cliff of the Mohave Point Overlook, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Gilded Flicker (Colaptes chrysoides) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

View of Fay Canyon in Sedona from the end of the trail, Arizona, United States of America, North America

Ancient Indian Ruins under Fay Arch in Fay Canyon in Sedona, Arizona, United States of America, North America

The sun rising at Grand Canyon North Rim, viewed from the Angels Window Overlook at Cape Royal, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon North Rim viewed from Roosevelt Point with Tritle Peak on the left and Atoko Point on the right, Gand Canyon, Arizona, United States of America, North Amerca

Grand Canyon from Navajo Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, 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

Adult California kingsnake (Lampropeltis californiae), Thong Chul, Tucson, Arizona, Arizona, United States of America, North America

Sunset over Grand Canyon South Rim, UNESCO World Heritage Site, Arizona, United States of America, North America

Sky Walk over the Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America

Panorama of Wilson Mountain and Wilson Canyon in Sedona, Arizona, United States of America, North America

Photographing at the Puebloan granaries at Upper Nankoweap, Grand Canyon National Park, Arizona, United States of America, North America

An adult red-spotted toad (Anaxyrus punctatus), basking in the sun in Grand Canyon National Park, Arizona, United States of America, North America

An adult ornate tree lizard (Urosaurus ornatu), basking in the sun in Grand Canyon National Park, Arizona, United States of America, North America

An adult desert spiny lizard (Sceloporus magister), Brandi Fenton Park, Tucson, Arizona, United States of America, North America

A steel picnic table near a cliff on the west side of Mohave Point at the Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Silouetted sandstone formation at dawn, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Sandstone cones at first light, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Dawn over Left and Right Mittens, Monument Valley Navajo Tribal Park, Arizona, United States of America, North America

View of Fay Canyon in Sedona from the end of the trail, Arizona, United States of America, North America

Pictographs, Honanki Heritage Site, Coconino National Forest, Arizona, United States of America, North America

The paved pathway between Bright Angel Point and the visitor center at Grand Canyon North Rim at twilight, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Sign marking the Nankoweap Trail for the Saddle Mountain Wilderness that borders Grand Canyon National Park, Arizona, United States of America, North America

An adult female Costa's hummingbird (Calypte costae) feeding in Madera Canyon, southern Arizona, Arizona, United States of America, North America

Wotan's Throne from Cape Royal, north rim, Grand Canyon, Arizona, United States of America, North America

West Rim, Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the North Rim of Grand Canyon National Park from Bright Angel Point, UNESCO World Heritage Site, Arizona, United States of America, North America

View from Cape Royal, North Rim, 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

Commercial oar boat runs the Deubendorff Rapid, just past river mile 132, Grand Canyon National Park, Arizona, United States of America, North America

Glen Canyon Recreation Area with, on the left, Vermillion Cliffs National Monument and Marble Canyon, viewed from an observation point along US89 south of Page, Arizona, United States of America, North America

Eroded curves in sandstone, Upper Antelope Canyon, near Page, Arizona, United States of America, North America

Moon over Paria Movie Set at sunset, Grand Staircase-Escalante National Monument, near Page, Arizona, United States of America, North America

Car against cloud at sunrise, Monument Valley Navajo Tribal Park, Arizona, United States of America, North America

Male pyrrhuloxia (Cardinalis sinuatus), The Pond, Amado, Arizona, United States of America, North America

Desert view point over the Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Glen Canyon Dam on the Colorado River in northern Arizona with Lake Powell in the background, Arizona, United States of America, North America

Badlands with yellow, tan, and purple dirt, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Sandstone formations and rock with clouds, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

View of Hermit Canyon from Dripping Springs trail at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The first tunnel along Bright Angel Trail in winter under Moonlight on the South Rim of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The cliffs of Bright Angel Canyon along the Bright Angel Trail in winter near midday on the South Rim of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the North Rim of Grand Canyon National Park from Bright Angel Point, UNESCO World Heritage Site, Arizona, 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

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 Puebloan granaries at Upper Nankoweap, Grand Canyon National Park, Arizona, United States of America, North America

Grand Canyon viewed west of Navajo Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Sunrise over the Left and Right Mittens, Monument Valley Navajo Tribal Park, Arizona, United States of America, North America

The evening sun sinks between a triple-monolith in the sandstone cliffs and pinnacles at Monument Valley, Arizona, United States of America, North America

Oza Butte viewed from Bright Angel Point on North Rim after sundown, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Mitten from the desert floor, late afternoon, Monument Valley Navajo Tribal Park, Utah Arizona border, United States of America, North America

A Mexican jay (Aphelocoma wollweberi), in a tree in the Chiricahua National Monument, Arizona, Arizona, United States of America, North America

View of a rock formation called Cathedral Rock from within Chocolate Canyon, Glen Canyon Recreation Area, Arizona, United States of America, North America