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

Pleasant Valley near sunset in the Kaibab National Forest just north of Grand Canyon North Rim, Arizona, United States of America, North America

Panorama view of Freya's Castle and Wotan's Throne from the overlook of Cape Royal on Grand Canyon North Rim, 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

Bright Angel Point trail sign pointing the way to the overlook on Grand Canyon North Rim, 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

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

Composed from eight photos, a panorama view of the Grand Canyon South Rim from the historic Watch Tower, UNESCO World Heritage Site, 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

Panorama of Bell Rock and Courthouse Butte, viewed from Big Park Loop Trail, Sedona, Arizona, United States of America, North America

Grand Canyon viewed from the Bright Angel Trail in winter just past the 1.5 Mile Rest House after sunrise, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Giant boulders along Trail 345 in the Granite Mountain Recreation Area of the Prescott National Forest.

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

The head of the Transept Canyon at Grand Canyon North Rim along the Widforss Trail, UNESCO World Heritage Site, Arizona, United States of America, North America

View of Tiponi Gap in the distance from the dry cliff of Tiponi Gap Falls in Petrified Forest National Park Arizona.

A giant petrified log balanced on a sandstone pedestal in Petrified Forest National Park Arizona along the Red Basin Trail.

A field of hoodoos along the Red Basin Trail in Petrified Forest National Park Arizona called Pharaoh's Garden.

A feminine shaped hoodoo in Petrified Forest Arizona on the north side of the Clam Beds called Queen of Pearls.

Valley of the Gods viewed from the north slope of the rock formation called Rudolph and Santa, northwest of Monument Valley and Mexican Hat, Utah, 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 North America

A sandstone hoodoo at Ferry Swale in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

A narrowing of the spur canyon just north of the main overlook of Horseshoe Bend, Arizona, United States of America, North America

View from the Abyss Overlook just after sunset, Grand Canyon, UNESCO World Heritage Site, 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

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

Steps down to Mather Point Overlook at Grand Canyon in winter after sunset, 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

Grand Canyon with Yuma Point on the left and Hermits Rest on the right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The Kaibab Forest in winter near Waldron Canyon west of Hermits Rest, Grand Canyon, Arizona, United States of America, North America

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

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

The red water of Lithodendron Wash, red from bentonite clay, in Petrified Forest National 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

Uncle Jim Point viewed from Bright Angel Point on the North Rim of Grand Canyon at twilight, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Alamo Lake with the Arrastra Mountain Wilderness in the distance, 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

Closeup of a male Praying Mantis native to Arizona on the hunt for a female, Arizona, United States of America, North America

Panorama of the First Forest in Petrified Forest National Park, 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

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 Lipan Point on the right from Pinal Point at Grand Canyon, with The Desert View Watchtower in the distance, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Ancient Indian Ruins on the edge of a cliff east of Papago Point at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, 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

A flowing Spring of salty brine water in Petrified Forest National Park Arizona. Located below Pintado Point.

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

View of the salty bentonite hills on the north side of the Blue Forest in Petrified Forest National Park Arizona.

The Horse Collar Ruins located between the Sipapu Arch Bridge and the Kachina Arch Bridge, Natural Bridges National Monument, Utah, 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

A pair of sandstone hoodoos at Ferry Swale in the Glen Canyon Recreation Area near Page, Arizona, United States of America, North America

The pathway into a 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

The bus stop at the Powell Memorial off Hermit Road at Grand Canyon, Arizona, United States of America, North America

The paved rim trail along the cliffs of Grand Canyon South Rim between the village and Trailview Overlook Vista, Grand Canyon, UNESCO World Heritage Site, 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 Kaibab Forest in winter near Waldron Canyon west of Hermits Rest, Grand Canyon, 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

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

Sign for the main visitor center at Grand Canyon North, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, 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

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

Grand Canyon view with a rock window beneath a cliff on the right, located west of Pinal Point on the south rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Middle Lagoon, one of three Lagoons at Dead Horse Ranch State Park, Arizona, United States of America, North America

View from the Starboard side of the formation called Sinking Ship in Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Ancient Indian Ruins on the north side of Cockscomb Butte in Sedona, Arizona, United States of America, North America

A ridge of purple bentonite clay jutting out into Jasper Forest at Petrified Forest National Park Arizona.

View from the end of a small box canyon on the west side of Lower Blue Mesa at Petrified Forest National Park Arizona.

The haunted Massacre House Ruins in Canyon del Muerto (Canyon of the Dead), on the north end of Canyon De Chelly, site of a Navajo massacre by Spanish Soldiers in 1825, Arizona, United States of America, North America

Betatakin Canyon, Navajo National Monument, inside the Navajo Indian Reservation northwest of the town of Kayenta, Arizona, United States of America, North America

View of Valley of the Gods from the Moki Dugway, also called Utah State Route 261, Utah, United States of America, North America

Valley of the Gods viewed from the south slope of the rock formation called Rudolph and Santa, northwest of Monument Valley and Mexican Hat, Utah, 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

Panorama view of Grand Canyon from the cliffs of Powell Point, Grand Canyon, UNESCO World Heritage Site, 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

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

The cliffs of Waldron Canyon west of Hermits Rest in winter, Grand Canyon, 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

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

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

Carved lions and statues, Porta Magna, Arsenale, in winter afternoon sun, Castello, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Bright Angel Point Bridge on Grand Canyon North Rim at twilight, Grand Canyon National Park, UNESCO World Heritage Site, 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

View of Glen Canyon Recreation Area from the middle of Lees Ferry Road at Marble Canyon, Arizona, United States of America, North America

The cliffs overlooking the First Forest at Petrified Forest National Park, 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