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A little rock arch near the cliff of the Spur Canyon north of the main overlook of Horseshoe Bend, Arizona, United States of America, North America

A dry waterfall of wavy sandstone in the spur canyon just north of the main overlook of Horseshoe Bend, Arizona, United States of America, North America

The path down into the Spur Canyon in the badlands of Horseshoe Bend, Arizona, United States of America, North America

The swirls and blocky texture of fossilized sand dunes in the badlands of Horseshoe Bend, Arizona, United States of America, North America

The burial site and memorial for Charles Brant who died in 1921 and his wife, who lived and worked in the Grand Canyon since it became a national park, Grand Canyon, Arizona, United States of America, North America

A dirt section of the rim trail between Hopi Point and Mohave Point, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

A rock platform below the cliffs of the Great Mohave Wall Overlook at Grand Canyon, Arizona, United States of America, North America

The very rocky pathway of the unmaintained Hermit Canyon Trail at Grand Canyon in winter with Waldron Canyon on the left in the distance, Grand Canyon, Arizona, United States of America, North America

The cliffs of Grand Canyon west of Monument Creek Vista, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The Greenway Trail that runs between Pima Point and Monument Creek Vista, Grand Canyon, Arizona, United States of America, North America

Grand Canyon viewed from Pima Point at sundown, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A pointed peak of bentonite in Hamilili Valley on the south end of Petrified Forest National Park, Arizona, United States of America, North America

Rock formation known as Swirls, on Colorado Plateau, Arizona, United States of America (U.S.A.), North America

Layers of tan sandstone, White Pocket, Vermilion Cliffs National Monument, 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

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

Red clouds over sandstone at sunrise, White Pocket, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Layered sandstone, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Tse Bighanilini Slot Canyon (Upper Antelope Canyon), carved sandstone formations, Antelope Canyon, Arizona, United States of America, North America

Totem Pole and Sand Springs, Monument Valley Tribal Park, 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

Totem Pole and Yei Bi Chei rock formations and sand dunes, Monument Valley, Arizona, United States of America, North America

Harris's hawk (Parabuteo unicinctus), Sweetwater Wetlands, Tucson, Arizona, United States of America, North America

Mount Hayden at dusk from Point Imperial, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

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

Angel's Window at Cape Royal on North Rim above Unker Creek near sundown, with smoke from a wildfire creating brown haze on the horizon, Gand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

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

A herd of wild Buffalo grazing in a meadow on the North Rim of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Adult Mexican long-nosed bat (Leptonycteris yerbabuenae), at a feeder at night, Westward Look Resort, Tucson, 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

Giant saguaro cactus (Carnegiea gigantea) under full moon at Gates Pass in the Tucson Mountains, Tucson, Arizona, United States of America, North America

Tree and bushes before sunrise. Monument Valley, Navajo Tribal Park, Arizona, United States of America, North America

Sunset from the south rim of the Grand Canyon at Shoshone Point, UNESCO World Heritage Site, Arizona, United States of America, North America

The large white blossoms of the night blooming Trichocereus Spachianus Cactus (Golden Torch Cactus), Arizona, United States of America, North America

The west rock ridge of the New Wave along the Beehive Trail in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

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

Panorama of the First Forest in Petrified Forest National Park, Arizona, United States of America, North America

Petrified Wood in the First Forest of Petrified Forest National Park, Arizona, United States of America, North America

Giant Hoodoos in the Devil's Playground at Petrified Forest National Park, Arizona, United States of America, North America

Sand Castle formations on the edge of the Red Basin in Petrified Forest National Park, Arizona, 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

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

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

Hikers head up a dry gulch in a side canyon off the Grand Canyon, 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

A fisheye view of a deep chasm east of Pinal Point at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the volcanic crater of Glassford Hill in Prescott Valley, Arizona, United States of America, North America

A hiker standing on a cliff between Zuni and Papago Points at Grand Canyon on a stormy day, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View from a flight out to the Bar 10 Ranch, North Rim of Grand Canyon National Park, Arizona, United States of America, North America

The spires of Cockscomb Butte in Sedona viewed from its south end summit, Arizona, United States of America, North America

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

The east rocks of the New Wave along the Beehive Trail in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

The overhang of a sandstone mesa, a fossilized sand dune, at Ferry Swale in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

A narrow canyon leading onto a rock island at Ferry Swale in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

A narrow canyon running between several rock islands at Ferry Swale in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

A sandstone hoodoo at Ferry Swale in the Glen Canyon Recreation Area near Page, 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

Picnic area behind the Powell Memorial at Grand Canyon National Park, Arizona, United States of America, North America

A sign marking the one way entrance to Hopi Point from Hermit Road, Grand Canyon, Arizona, United States of America, North America

Looking back from Mohave Point Overlook near sundown, Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Look back at the Great Mohave Wall Overlook from a rock platform just below the cliffs at Grand Canyon, Arizona, United States of America, North America

Grand Canyon view from the Great Mohave Wall Overlook, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Steps down to Mather Point Overlook at Grand Canyon in winter after sunset, Grand Canyon, Arizona, United States of America, North America

Desert landscape with rock formations in Monument Valley, Arizona, United States of America, North America

View from Moran Point at Grand Canyon South Rim on a cloudy day with Zuni Point on the right in the distance, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Wispy clouds at sunset, White Pocket, Vermilion Cliffs National Monument, Arizona, United States of America, North America

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

White and pink sandstone ridges, White Pocket, Vermilion Cliffs National Monument, Arizona, United States of America, North America

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

Giant boulders from a rock slide in a narrow section of the south fork of Soap Creek Canyon at Marble Canyon, Arizona, United States of America, North America

Male broad-billed hummingbird (Cynanthus latirostris) in flight, Madera Canyon, Coronado National Forest, Arizona, United States of America, North America

Male magnificent hummingbird (Eugenes fulgens) in flight, Madera Canyon, Coronado National Forest, Arizona, United States of America, North America

Wild turkey (Meleagris gallopavo) feather iridescence, Chiricahuas, Coronado National Forest, Arizona, United States of America, North America

Female ladder-backed woodpecker (Picoides scalaris), Chiricahuas, Coronado National Forest, Arizona, United States of America, North America

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

Sunrise over sandstone formations, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Western Mitten Ridge viewed from the Hangover Trail, Sedona, Arizona, United States of America, North America

Sunset from the south rim of the Grand Canyon at Shoshone Point, UNESCO World Heritage Site, Arizona, United States of America, North America

Sunrise from the south rim of the Grand Canyon, 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 Bell Rock and Courthouse Butte, viewed from Big Park Loop Trail, Sedona, Arizona, United States of America, North America

Panorama of Courthouse Butte, Rabbit Ears, and Lee Mountain in Sedona, composed of eight photos, Arizona, United States of America, North America

View of the sky from the centre of Cathedral Rock in Sedona, Arizona, United States of America, North America

View from the centre spire of Cathedral Rock in Sedona, Arizona, 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 pillar of sandstone on the west side of Agate Plateau in Petrified Forest National Park, Arizona, United States of America, North America

Bright Angel Canyon viewed from Coconino Overlook along North Kaibab Trail on Grand Canyon North Rim, Arizona, United States of America, North America

Panorama view of Grand Canyon from Widforss Point on the North Rim, UNESCO World Heritage Site, Arizona, United States of America, North America