Jeff Foott / Full moon over Balanced Rock formation, Arches National Park, Utah
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Jeff Foott / Double O Arch, Arches National Park, Utah
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Jeff Foott / Mule-ears (Wyethia amplexicaulis) flowers at the The Organ, Arches National Park, Utah
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Jeff Foott / Marching Men sandstone formation, Arches National Park, Utah
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Jeff Foott / Winding road and sandstone formations, La Sal Mountains, Arches National Park, Utah
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Jeff Foott / Sandstone rock formations, La Sal Mountains, Arches National Park, Utah
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Jeff Foott / Sandstone rock formations, Theodore Roosevelt National Park, North Dakota
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Vincent Grafhorst / Minden / River in sandstone cave, Sof Omar Cave, Ethiopia
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Chien Lee / Limestone rock formations, Snow Mountains, Papua, Indonesia
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Chien Lee / Limestone pinnacles, Tsingy de Bemaraha National Park, Madagascar
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Jeff Foott / The Citadel Ruins, Cedar Mesa area, Bears Ears National Monument, Utah
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Jack Dykinga / Eroded Chinle shale mounds with colour bands, beneath the Paria Plateau, Vermilion Cliffs National Monument, Paria Canyon Vermilion, Arizona, USA.