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From Bright Angel Point, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, 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

Cactus wren (Campylorhynchus brunneicapillus), Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

Lucy's warbler (Vermivora luciae), The Pond, Amado, Arizona, United States of America, North America

An overlook along the Transept Trail with Oza Butte on the right at Grand Canyon North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

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

House Valley, with the Vermilion Cliffs in the distance, viewed from the summit of Saddle Mountain on the north edge of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, 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

Western Grebe (Aechmophorus occidentalis) swimming, Tonto National Forest, Arizona, United States of America, North America

A hiker looking out from a cliff in Hermit Canyon at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

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

An adult female black-chinned hummingbird (Arcgilochus alexandri), Madera Canyon, southern Arizona, Arizona, United States of America, North America

A view of Arizona's Canyon De Chelly from its south rim, Arizona, United States of America, North America

Purple stains in sandstone, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Purple loops in sandstone, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Panorama of Marble Canyon viewed from Johnson Point below the Vermilion Cliffs, Glen Canyon Recreation Area, Arizona, United States of America, North America

Grand Canyon South Rim viewed from Cedar Ridge along the South Kaibab Trail, UNESCO World Heritage Site, Arizona, United States of America, North America

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

White Horse Lake in the Kaibab National Forest of northern Arizona viewed from its northwest lagoon, Arizona, United States of America, North America

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

View of the Colorado River from the Glen Canyon Dam Bridge on Highway 89, Arizona, United States of America, North America

A hiker standing on a rock island at Pinal Point Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

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

A giant petrified log on the Purple Peninsula in Petrified Forest National Park, Arizona, United States of America, North America

Fisheye view of a deep chasm near Papago Point at Grand Canyon with Zuni Point in the distance, 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

An adult male desert spiny lizard (Sceloporus magister), under a ledge in Grand Canyon National Park, Arizona, United States of America, North America

Commercial rafters run the Sheer Wall Rapid, just past river mile 14, Grand Canyon National Park, Arizona, United States of America, North America

A dry waterfall at the base of a rock island at Ferry Swale in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

Various hoodoos in Angels Garden at Petrified Forest National Park, Arizona, United States of America, North America

A lone hoodoo on the edge of Angels Garden in Petrified Forest, Arizona, United States of America, North America

One of the few petrified trees almost intact, The Onyx Bridge in Petrified Forest National Park, Arizona, United States of America, North America

An overhead view of a slot canyon in the south fork of Soap Creek Canyon at Marble Canyon, Arizona, United States of America, North America

Male gila woodpecker (Melanerpes uropygialis), The Pond, Amado, Arizona, United States of America, North America

Male acorn woodpecker (Melanerpes formicivorus), Chiricahuas, Coronado National Forest, Arizona, United States of America, North America

A sign posted by the Park Service pointing the way to Cape Final on the North Rim of Grand Canyon, Arizona, United States of America, North America

An overlook along the Transept Trail at Grand Canyon North Rim at twilight, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon viewed from the cliffs of Walhalla Glades on the North Rim, with Cape Royal on left, Vishnu Temple in the center, and Wotan's Throne on right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Horseshoe Bend on the Colorado River at the South Rim, Arizona, United States of America, North America

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

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

Mittens at dusk, late evening sun lights the desert floor, Monument Valley Navajo Tribal Park, Utah Arizona border, United States of America, North America

Alamo Lake with the Arrastra Mountain Wilderness in the distance, Arizona, United States of America, North America

Looking towards Wotan's Throne from south 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

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

Sandstone buttes in Monument Valley Navajo Tribal Park on the Arizona-Utah border, United States of America, North America

Ancestral Puebloan ruin at Desert View on the Colorado River, 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

Panorama of Cathedral Rock covered in winter snow and ice, Sedona, Arizona, United States of America, North America

Red Rock State Park viewed from the Eagle Nest Trail Overlook, Sedona, Arizona, United States of America, North America

Rafters on the Colorado River through the Grand Canyon, Arizona, United States of America, North America

Grand Canyon northwest view from a rock island just beyond the tourist overlook of Lipan Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The confluence of Badger Canyon and the Colorado River in Marble Canyon, Arizona, United States of America, North America

A deep dropoff at Grand Canyon called Loki's Abyss east of Thor's Hammer Overlook, with Loki's Rock just right of center, 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

Commercial rafters run the Lava Falls Rapid, just before river mile 180, Grand Canyon National Park, Arizona, United States of America, North America

Glen Canyon Dam viewed from main overlook just south of dam, Page, Arizona, United States of America, North America

Dinosaur tracks at a tourist attraction on the Navajo Indian Reservation near Tuba City, Arizona, United State of America, North America

Ancient Hogans used in Navajo ceremonies, in Navajo National Monument, Navajo Indian Reservation northwest of the town of Kayenta, Arizona, United States of America, North America

Saguaro cactus (Carnegiea gigantea) dot the land surrounding Picacho Peak, Picacho Peak State Park, Arizona, United States of America, North America

Round-tailed ground squirrels (Xerospermophilus tereticaudus), Brandi Fenton Park, Tucson, Arizona, United States of America, North America

View from below the cliffs of the spur canyon just north of the main overlook of Horseshoe Bend, Arizona, United States of America, North America

View from below the cliffs of the spur canyon just north of the main overlook of Horseshoe Bend, Arizona, United States of America, North America

A rocky path to the Mohave Point Overlook, Grand Canyon, 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

Various hoodoos in Angels Garden at Petrified Forest National Park, Arizona, United States of America, North America

White, tan, and red sandstone butte, White Pocket, Vermilion Cliffs National Monument, Arizona, 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

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

Sandstone formations, White Pockets, Paria Plateau, Northern Arizona, United States of America, North America

Ferruginous Hawk (Buteo regalis) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

Coronado Butte at Grand Canyon viewed from the end of Coronado Ridge, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Mexican jay (Aphelocoma ultramarina), Chiricahuas, Coronado National Forest, Arizona, 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

A bench overlooking Grand Canyon North Rim from the Vista Encantada Picnic area, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Mitten at dusk lit by late evening sun, Monument Valley Navajo Tribal Park, Utah Arizona border, United States of America, North America

A young red-tailed hawk (Buteo jamaicensis), on a sign near Whitewater Draw, Coronado National Forest, Arizona, United States of America, North America

Organ pipe cactus (Stenocereus thurberi) at night in Organ Pipe Cactus National Monument, Sonoran Desert, Arizona, United States of America, North America

View of a rock formation called Cathedral Butte at the base of the Vermilion Cliffs, Glen Canyon Recreation Area, 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

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

Sandstone buttes in Monument Valley Navajo Tribal Park on the Arizona-Utah border, United States of America, North America

The centre Altar of Cathedral Rock, with Courthouse Buttes in the distance just above the flat altar rock in the centre, Sedona, Arizona, United States of America, North America