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Ephemeral Spring on Red Wall of Roaring Springs Canyon, North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

View of the Roaring Springs Canyon cliffs from the Red Wall Bridge, Grand Canyon North Rim, UNESCO, Arizona, United States of America

Lonely Boulders and exposed rock in Pleasant Valley, Kaibab National Forest just north of Grand Canyon North Rim, Arizona, United States of America

Looking back up the first leg of the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The Coconino Overlook along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The 11th switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

A curve in the North Kaibab Trail between Coconino Overlook and the Supai Tunnel Rest Area, Grand Canyon, Arizona, United States of America

The 20th switchback along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America

The interior of the Supai Tunnel along the North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America

Torrent, Riva Valley (Val di Riva) (Reintal), adjacent to Ahrntal (Valle Aurina), South Tyrol (Alto Adige), Italy

Hiker at the foot of the Tre Cime di Lavaredo (Three Peaks of Lavaredo), Three Peaks Nature Park, Dolomites, UNESCO, South Tyrol, Italy

Val Marzon viewed from path connecting refuges Auronzo and Lavaredo, Three Peaks Nature Park, Dolomites, South Tyrol (Alto Adige), Italy

Three hikers at foot of Tre Cime di Lavaredo (Three Peaks of Lavaredo), Three Peaks Nature Park, Dolomites, UNESCO, South Tyrol, Italy

Mountain Hut A.Locatelli-S.Innerkofler, Three Peaks Nature Park, Dolomites, South Tyrol (Alto Adige), Italy

Hikers on path overlooking the Lago dei Piani inferiore, Three Peaks Nature Park, Dolomites, South Tyrol, Italy

Hikers in mist near the refuge Lavaredo, Three Peaks Nature Park, Dolomites, South Tyrol (Alto Adige), Italy

Cappella degli Alpini in the fog, Three Peaks Nature Park, Dolomites, South Tyrol (Alto Adige), Italy

Hiker in mist near the refuge Lavaredo, Three Peaks Nature Park, Dolomites, South Tyrol (Alto Adige), Italy

Hikers on path between Locatelli and Pian di Cengia refuges with Punta dei Tre Scarperi behind, Three Peaks Nature Park, Dolomites, South Tyrol, Italy

Hiker on path between Locatelli and Pian di Cengia refuges with Punta dei Tre Scarperi behind, Three Peaks Nature Park, Dolomites, South Tyrol, Italy

Red hills of bentonite clay overlooking Dead Wash in Petrified Forest National Park, Arizona, United States of America

An unnamed canyon that leads to Dead Wash in Petrified Forest National Park, Arizona, United States of America

An island of rock in an unnamed canyon that leads to Dead Wash in Petrified Forest National Park, Arizona, United States of America

Boulder pile in a valley leading to Dead Wash in Petrified Forest National Park, Arizona, United States of America

Boulder pile in a valley leading to Dead Wash, Petrified Forest National Park, Arizona, United States of America

Woman standing on a rock overlooking the Wadi Shab, canyon near Tiwi, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Boundary gate and cattle-proof fence between Coconino National Forest and Wet Beaver Creek Wilderness, Arizona, United States of America

Boundary gate and cattle-proof fence between Coconino National Forest and Wet Beaver Creek Wilderness, Arizona, United States of America

Casner Canyon in Wet Beaver Creek Wilderness viewed from White Mesa summit, in Coconino National Forest, Arizona, United States of America

Checkerboard Mesa, a sandstone peak standing 900 feet high, Kane County, Zion National Park, Utah, United States of America

Rocky mountain trail, with a lone windswept tree and panoramic views of the surrounding landscape, Sierra Nevada, Andalusia, Spain

Sandstone bowl of captured rainwater reflecting the sky along Hog Heaven Trail in Sedona, Arizona, United States of America, North America

Hog Wash (Hog Heaven), the intersection of two trails on the Northwest side of the Twin Buttes in Sedona, Arizona, United States of America, North America

Cascading waterfall beneath a vivid red bridge, surrounded by moss-covered rocks and lush greenery in a peaceful forest, Kyoto, Honshu, Japan

Fisheye view from below the fire watchtower on summit of Apache Maid Mountain, Coconino National Forest, Arizona, United States of America

View from second deck of fire watchtower on summit of Apache Maid Mountain, Coconino National Forest, Arizona, United States of America

Coconino National Forest from the southwest summit of Apache Maid Mountain, Coconino National Forest, Arizona, United States of America

Road to the summit of Apache Maid Mountain, Coconino National Forest, Arizona, United States of America

View of snow covered mountains and trail lights in Courmayeur at dusk in winter, Courmayeur, Aosta Valley, Italian Alps, Italy

View of St. Moritz, Celerina and the Engadin lakes from top of Muottas Muragl, Canton of Grisons, Switzerland

John Ford's Point, Merrick Butte in background, Monument Valley Navajo Tribal Park, Utah, United States of America

Scenic view from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

High angle view of Boulder Creek, the Watson Lake Loop Trail crosses this creek, Prescott, Arizona, United States of America, North America

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland

Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park in winter, UNESCO, Western Region, Iceland

Basalt boulders and cliffs, Johnson Canyon east of Bainbridge Steel Dam Lake near Ash Fork, Kaibab National Forest, Arizona, United States of America

Basalt boulders and cliffs, Johnson Canyon between Bainbridge Steel and Stone Dams, Kaibab National Forest, Arizona, United States of America

Basalt boulders and cliffs, Johnson Canyon between Bainbridge Steel and Stone Dams, Kaibab National Forest, Arizona, United States of America

Old water pipe, Johnson Canyon between Bainbridge Steel and Stone Dams near Ash Fork, Kaibab National Forest, Arizona, United States of America

Basalt boulders and cliffs in a section of Johnson Canyon halfway between the Bainbridge Steel Dam and Stone Dam near Ash Fork Arizona in the Kaibab National Forest.

The Alpine Circuit Trail at Lake O'Hara, Yoho National Park, UNESCO World Heritage Site, British Columbia, Canadian Rockies, Canada, North America

Panorama of Sedona viewed from the secret trail that runs along the eastern side of Cathedral Rock, Sedona, Arizona, United States of America, North America

Close up panorama of Cathedral Rock in Sedona viewed from the secret trail that runs along the eastside of the rock, Sedona, Arizona, United States of America, North America

Panorama view of Courthouse Butte and Cathedral Rock from a sandstone terrace off of Llama Trail in Sedona, Arizona, United States of America, North America

Cathedral Rock in Sedona viewed from a hidden trail on the west side of the rock, Sedona, Arizona, United States of America, North America

Lightning storm striking Cathedral Rock in Sedona viewed from the Little Horse Trail, Sedona, Arizona, United States of America, North America

Close up of the eastern half of Mitten Ridge, accessible by way of the Hangover Trail, Sedona, Arizona, United States of America, North America

Sacred Pools of Hog Heaven, sandstone bowls of captured rainwater along the Hog Heaven Trail in Sedona, Arizona, United States of America, North America

View of Chicken Point from the end of the High On The Hog Trail in Sedona, Arizona, United States of America, North America

Lightning striking during a storm over Cibola Rock in Uptown, viewed from the Broken Arrow Trail, Sedona, Arizona, United States of America, North America

Hiking in the Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America

Hiking through lunar landscape up to Cramer Divide, Sawtooth Mountains, Sawtooth Wilderness, Sawtooth National Recreation Area, Rocky Mountains, Idaho, United States of America, North America