Jack Dykinga / Aerial view of Urique Canyon after summer monsoonal rain, Barranca Del Cobre NP, Chihuahua, Mexico

Tim Fitzharris / Storm clouds over the Colorado River at Horseshoe Bend near Page, Arizona

Anup Shah / Aerial view of gorge, Hell's Gate NP, Great Rift Valley, Kenya

David Noton / Looking down into Grand Canyon at dawn, Grand Canyon NP, Arizona, USA

Rolf Nussbaumer / Acorn woodpecker {Melanerpes formicovus} Male, Madera Canyon, Arizona, USA.

Larry Michael / Snow covered rocks in Bryce Canyon National Park, Utah, USA

Tim Fitzharris / Sunrise as seen from Toroweap Overlook, Grand Canyon National Park, Arizona

Tim Fitzharris / Full moon over the Grand Canyon at sunset as seen from Pima Point, Grand Canyon National Park, Arizona

Jim Brandenburg / Sunset over Grand Canyon National Park, Arizona

Tim Fitzharris / View from Grandview Point looking over sandstone canyons of Monument Basin in the Island in the Sky section of the park, Canyonlands National Park, Utah

Rolf Nussbaumer / Waimea canyon at sunset, Kauai, Hawaii.

Mary McDonald / Broad billed hummingbird (Cynanthus latirostris) AZ, USA Madera Canyon, Arizona

Tim Fitzharris / Yellowstone Falls and Grand Canyon of Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / Small sandstone canyon carved by water, exposes strong pattern of parallel lines, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Coyote (Canis latrans) looking for handouts from tourists, Mather Point parking lot on South Rim, Grand Canyon National Park, Arizona

Yva Momatiuk & John Eastcott / California Condor (Gymnogyps californianus) immature bird flying with transmitter attached, critically endangered extinct in wild and recently re-introduced, 9-10 foot wingspan, Marble Canyon, Arizona

Tim Fitzharris / Havasu Creek which is lined with Cottonwood trees, being fed by one of its three cascades, Havasu Falls, Grand Canyon, Arizona

Tim Fitzharris / Ponderosa Pine (Pinus ponderosa) trees with snow, Grand Canyon National Park, Arizona

Tim Fitzharris / South Rim of Grand Canyon with a dusting of snow seen from Yaki Point, Grand Canyon National Park, Arizona

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum) forest, King's Canyon National Park, California

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum) trees with recent dusting of snow, King's Canyon National Park, California

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum) trees with dusting of snow, King's Canyon National Park, California

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum) and star trails in King's Canyon National Park, California

Tim Fitzharris / Broad-tailed Hummingbird (Selasphorus platycercus) feeding on the nectar of a Desert Penstemon (Penstemon pseudospectabilis) flower, New Mexico

Tui De Roy / San Rafael Falls on the Coca River squeezes through a lava canyon in wet temperate rainforest, Ecuador

Tim Fitzharris / Broad-tailed Hummingbird (Selasphorus platycercus) feeding on the nectar of a Desert Penstemon (Penstemon pseudospectabilis) flower, New Mexico

Pete Oxford / Rainforest at dawn. Pongo de Mainique Canyon. Urubamba River, Amazon rainforest, Peru. South America

Gavin Hellier / Rock 'Hoodos' in Bryce Canyon NP, Utah, USA

Gavin Hellier / Thor's Hammer and 'Hoodos' in Bryce Amphitheatre in snow in winter, Bryce Canyon NP, Utah, USA

Gavin Hellier / Horse riding through Bryce Amphitheatre, Bryce Canyon NP, Utah, USA

Gavin Hellier / Panoramic view of Thors hammer and hoodoos in Bryce Amphitheatre in winter, Bryce Canyon NP, Utah, USA

Gavin Hellier / Panoramic view of hoodoos in Bryce Amphitheatre in winter, Bryce Canyon NP, Utah, USA

HUW CORDEY / Chuckwalla lizard sunning {Sauromalus obesus} Grand Canyon, AZ, USA

Charlie Summers / Rock squirrel (Otospermophilus variegatus) on the rim of the Grand Canyon, Arizona, USA, September.

Charlie Summers / Rock Squirrel (Otospermophilus variegatus) climbing on a lichen covered rock, Grand Canyon, Arizona, USA.

George Sanker / Yellowstone River flowing through Grand Canyon of Yellowstone, Yellowstone National Park, Wyoming, USA. June 2018.

George Sanker / Calcite Springs Overlook, view of Grand Canyon of Yellowstone in evening light. Yellowstone National Park, Wyoming, USA. June 2018.

Jack Dykinga / Dead trees and smoke plume of forest fire in distance, fire started by lightning strike. Near North Rim of Grand Canyon National Park, Kaibab National Forest, Arizona, USA. 2019.

Jack Dykinga / Sun rays over The Grand Canyon, Arizona, USA. 2019.

Steven David Miller / Kings Creek and sandstone cliffs, viewed from Kings Canyon Rim walk. Watarrka National Park, Northern Territory, Australia. 2014.

Jack Dykinga / Sunset over temples and buttes of Grand Canyon National Park, from Navajo Point, Arizona, USA. May 2019.

Jack Dykinga / Sunset over temples and buttes of Grand Canyon National Park, from Navajo Point, Arizona, USA. May 2019.

Bernard Castelein / Ankarokaroka canyon, Ankarafantsika NP, Madagascar.

Bernard Castelein / Ankarokaroka canyon, Ankarafantsika NP, Madagascar.

Bernard Castelein / Ankarokaroka canyon, Ankarafantsika NP, Madagascar.

Bernard Castelein / Ankarokaroka canyon, Ankarafantsika NP, Madagascar.

Jack Dykinga / Titus Canyon conglomerate and quartz formations, Death Valley National Park, California, USA, March 2019.

Jack Dykinga / Patterns in sandstone with cross bedding and flaking in canyon walls. Valley of Fire State Park, Great Basin Desert, Nevada, USA, February.

Oriol Alamany / Cliffs with snow in Badam canyon near Kibber in Spiti Valley, Cold Desert Biosphere Reserve, Himalaya, Himachal Pradesh, India, March

Oriol Alamany / Ice waterfalls in the depth of Sudong canyon near Kibber, Spiti Valley, Cold Desert Biosphere Reserve, Himalaya, Himachal Pradesh, India, March

Oriol Alamany / Sudong canyon near Kibber, in Spiti Valley, Cold Desert Biosphere Reserve, Himalaya, Himachal Pradesh, India, March

Jack Dykinga / Landscape of hoodoos in snow at sunrise, Bryce Canyon National Park, Utah, USA, January.

Jack Dykinga / Landscape of hoodoos in snow at sunrise, Bryce Canyon National Park, Utah, USA, January.

Jack Dykinga / Winter snow storms cause wind-blown drifting along the canyon rim, Bryce Canyon National Park, Utah, USA, January.

Jack Dykinga / Silent City section, with ridges lined with new fallen snow creating a diagonal. Bryce Canyon National Park, USA, January.

Jack Dykinga / Landscape of hoodoos in snow at sunrise, Bryce Canyon National Park, Utah, USA, January.

Jack Dykinga / Silent City section, with ridges lined with new fallen snow creating a diagonal. Bryce Canyon National Park, USA, January.

Jack Dykinga / Bryce Canyon National Park after winter snow storms caused heavy frost and snow to cover conifer trees. Bryce Canyon National Park, Utah, USA, January.

Jack Dykinga / Conifer tree branch covered in snow and frost from winter snow storm. Bryce Canyon National Park, Utah, USA, January.

Jack Dykinga / Landscape of wind blown snow and canyons at dawn. Inspiration point, Bryce Canyon National Park, Utah, USA, January.

Jack Dykinga / Landscape of wind blown snow and canyons at dawn. Inspiration point, Bryce Canyon National Park, Utah, USA, January.

Jack Dykinga / Sunrise after snow storm with distant hoodoos and spires in fog. Bryce Canyon National Park, Utah, USA, January.

Tim Fitzharris / Rainbow over canyon cliffs, Wotan's Throne, Grand Canyon, Arizona

John Shaw / Dead tree at sunset, at Bristlecone Point, Bryce Canyon National Park, Utah, January.

Jack Dykinga / Long Canyon on the historic Burr Trail, with Douglas fir (Pseudotsuga menziesii) against the 'varnished' canyon walls. Grand Staircase-Escalante National Monument, Utah, USA. October 2018.

Jack Dykinga / Long Canyon, side canyon with Boxelder leaves (Acer negundo) framing a desert varnish tapestry of color. Grand Staircase-Escalante National Monument, Utah

Jack Dykinga / House of fire ruin in Mule Canyon, Bears Ears National Monument, Cedar Mesa, Utah, USA.

Jack Dykinga / Long Canyon on the historic Burr Trail, with Douglas fir (Pseudotsuga menziesii) against the 'varnished' canyon walls with sheets of water flowing over the sandstone. Grand Staircase-Escalante...

Marie Read / Red-breasted sapsucker (Sphyrapicus ruber) adult feeding on tree sap from shallow wells it has drilled in bark of Curl-leaf Mountain-mahogany (Cercocarpus ledifoius), Lee Vining Canyon, California, US...

Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in riverine dip in autumn, Deer Creek Canyon, Grand Staircase-Escalante National Monument, Utah

Jeff Foott / Tourists in creek, Red Rock Creek, Red Rock Canyon, Waterton Lakes National Park, Alberta, Canada

Oriol Alamany / Snow Leopard (Panthera uncia) female with two cubs climbing a canyon cliff at dusk at 4400 metres, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February

Oriol Alamany / Snow Leopard (Panthera uncia) female with two cubs climbing a canyon cliff at dusk at 4400 metres, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February

Oriol Alamany / Snow Leopard (Panthera uncia) female with two cubs climbing a canyon cliff at dusk at 4400 metres, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February

Oriol Alamany / Snow Leopard (Panthera uncia) female with two cubs resting for the day on a canyon cliff at 4400 metres, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, Febru...

Richard Herrmann / California Sea Lion (Zalophus californianus) predating on Squid (Loligo opalescens), Silver Canyon, Catalina Island, California

Richard Herrmann / Squid (Loligo opalescens) group, Silver Canyon, Catalina Island, California

Donald M. Jones / Canyon Wren (Catherpes mexicanus) calling, Montana

Steven David Miller / Central netted ground dragon (Ctenophorus nuchalis) basking in evening light. Kings Canyon, Watarrka National Park, Northern Territory, Australia.

Steven David Miller / White-plumed honeyeater (Ptilotula penicillata) perched on branch. Kings Canyon, Watarrka National Park, Northern Territory, Australia.

Erlend Haarberg / River and marble formations in the Corbels canyon. Lahko National Park, Fjell, Norway, July.

Erlend Haarberg / Marble formations in the Corbels canyon. Lahko National Park, Fjell, Norway, July.

Oriol Alamany / Kibber canyon in Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February

Erlend Haarberg / River and marble formations in the Corbels canyon. Lahko National Park, Fjell, Norway, July.

Oriol Alamany / Samba Lamba Nallah canyon over Kibber village in Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February

Oriol Alamany / Canyon full of snow near Kibber village, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February 2017.

Oriol Alamany / Tracker looking for Snow leopard (Panthera uncia) in a canyon near Kibber village, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February 2017.

Oriol Alamany / Himalayan ibex (Capra sibirica) on the snow in a canyon cliff ledge, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February

Oriol Alamany / Deep Chicham canyon with snow, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February 2017.

Philippe Clement / View into the Gorges du Verdon / Verdon Gorge canyon from belvedere along the Route des Cretes, Provence-Alpes-Cote d'Azur, France, September 2018

Philippe Clement / River Verdon at Point Sublime, start of the Sentier Martel in the Gorges du Verdon / Verdon Gorge canyon, Provence-Alpes-Cote d'Azur, France, September 2018

Guy Edwardes / Sand Pyramids in winter, Rozhen, Melnik, Bulgaria, January 2016.

Guy Edwardes / Sunrise at Sand Pyramids, Bulgaria. February 2014

Guy Edwardes / Fjaorargljufur canyon, Kirkjubaejarklaustur, Iceland, August 2017.

Tim Fitzharris / Zion Canyon and Virgin River, Zion National Park, Utah

Tim Fitzharris / River in canyon, Green River from Green River Overlook, Canyonlands National Park, Utah