Jouan Rius / Antelope Canyon, a slot canyon with eroded sandstone patterns, Navajo Tribal Park, Arizona, USA, December 2012.
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Jouan Rius / Antelope Canyon, a slot canyon with eroded sandstone patterns, Navajo Tribal Park, Arizona, USA, December 2012.
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Jouan Rius / Antelope Canyon, a slot canyon with eroded sandstone patterns, Navajo Tribal Park, Arizona, USA, December 2012.
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Jouan Rius / Antelope Canyon, a slot canyon with eroded sandstone patterns, Navajo Tribal Park, Arizona, USA, December 2012.
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Jouan Rius / Antelope Canyon, a slot canyon with eroded sandstone patterns, Navajo Tribal Park, Arizona, USA, December 2012.
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Jouan Rius / Antelope Canyon, a slot canyon with eroded sandstone patterns, Navajo Tribal Park, Arizona, USA, December 2012.
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Floris van Breugel / Reflected light creating color gradients in a mud slot canyon in Mecca Hills Wilderness north of Salton Sea, California, USA, January
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Ingo Arndt / Eroded sandstone and rays of sunlight in Antelope Canyon, Arizona
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Ingo Arndt / Eroded sandstone and ray of sunlight in Antelope Canyon, Arizona
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Ingo Arndt / Eroded sandstone and light in Antelope Canyon, Arizona
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Andy Rouse / Mountain lion / Puma (Felis concolor) in slot canyon, captive, Arizona, USA (non-ex)
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Jack Dykinga / Ponderosa pines (Pinus ponderosa) and Big tooth maples (Acer grandidentatum) against the cliffs of a sandstone slot canyon in Zion National Park, Utah
