Tim Fitzharris / Cathedral Rock at sunset, Coconino National Forest, Arizona

Tim Fitzharris / Water in pool at Dead Horse Point overlooking the Colorado River, Canyonlands National Park, Utah

Tim Fitzharris / Cactus and Cathedral Rock formation at sunset, Coconino National Forest, Arizona

Tim Fitzharris / Cathedral Rock formation reflected in pool, Coconino National Forest, near Sedona, Arizona

Kirkendall-Spring / Soda Butte Creek in Yellowstone National Park with the Absaroka Range in the distance, Wyoming, USA, June 2013.

Kirkendall-Spring / Beartooth Butte reflected in Beartooth Lake, Shoshone National Forest, Wyoming, USA

Tim Fitzharris / East river meandering near Crested Butte, Colorado

Tim Fitzharris / Gothic Mountain and Beaver Lodge, near Crested Butte, Colorado

Yva Momatiuk & John Eastcott / Seasonal rainwater pool reflecting surrounding sandstone buttes, autumn evening, Paria Wilderness Area, Arizona

TOM MANGELSEN / Conifer leaning over Soda Butte Creek during a snowstorm, Yellowstone National Park, Wyoming, USA. January.

TOM MANGELSEN / A conifer leaning over Soda Butte Creek in winter with Abiathar Peak and Amphitheater Mountain in the background, Round Prairie, Yellowstone National park, Wyoming, USA. February.

Jack Dykinga / Turquoise waters of the Little Colorado River near its confluence with Colorado River in the Grand Canyon with dawn light on Chuar Butte, Grand Canyon National Park, Arizona, USA. May, 2014.