David Pattyn / Alpine ibex (Capra ibex) male standing on a ridge. Gran Paradiso National Park, Italy. December

David Pattyn / Alpine ibex (Capra ibex) male silhouetted at dusk, on top of a ridge. Gran Paradiso National Park, Italy. December

David Noton / Montagne Sainte-Victoire at dawn, Var, Provence, France, October 2012.

David Noton / Montagne Sainte-Victoire at dawn, Var, Provence, France, October 2012.

Peter Cairns / Procession of migrating Elk (Cervus elaphus) and Bison (Bison bison) through the National Elk Refuge, Wyoming, USA, February.

Axel Gebauer / Main ridge of Caucasus Mountains, Bezengi region, Kabardino-Balkaria, Central Caucasus Mountains, Russia, October 2013.

Axel Gebauer / Ushba twin peak and main ridge of Caucasus Mountains, Kabardino-Balkaria, Central Caucasus Mountains, Russia, October 2012.

Axel Gebauer / Main ridge of Caucasus mountians, Bezengi region, Kabardino-Balkaria, Central Caucasus Mountains, Russia, October 2013.

Axel Gebauer / View of Elbrus region over main ridge of Caucasus Mountains, Kabardino-Balkaria, Northern Caucasus Mountains, Russia, October 2013.

Axel Gebauer / Djuga ridge and summits, Western Caucasus Mountains, Russia, March 2013.

Axel Gebauer / View of Elbrus region over main ridge of Caucasus Mountains, Kabardino-Balkaria, Northern Caucasus Mountains, Russia, October 2013.

Axel Gebauer / Main ridge of Central High Caucasus Mountains, Bezengi region, Kabardino-Balkaria, Russia, October.

Axel Gebauer / Nordmann fir (Abies nordmanniana) stand covered in snow, near Krasnaya Polyana, Western Caucasus Mountains, Russia, March 2013.

Axel Gebauer / Djuga ridge and summits, Western Caucasus Mountains, Russia, March 2013.

Axel Gebauer / Djuga ridge and summits, Western Caucasus Mountains, Russia, March 2013.

Colin Monteath / Ridges engulfed by mist at sunset, Tumbledown Bay, Banks Peninsula, Canterbury, South Island, New Zealand

Mark Moffett / Seasonal creek meandering among mountain ridges, Hajhir Mountains, Socotra, Yemen

Enrique Lopez-Tapia,Enrique Lopez-Tapia / Snow and volcanic ash on Deception Island, Antarctica.

Enrique L?pez-Tapia / Evening light illuminates the Nubra Valley mountains. Ladakh, India. September 2011. Awarded in Land category of Wildlife Photographer of the Year, 2016.

Steven Kazlowski / Full moon over Gates of the Arctic National Park, Brooks Range, North Slope, Alaska, USA

Ernie Janes / Potato crop growing in rows, Norfolk, UK June

Colin Monteath / Trekker and limestone ridges with peaks from 4700 meter Cacananpunta Pass, Cordillera Huayhuash, Andes, Peru

Mark Taylor / Mt Fitz Roy and Laguna Los Tres, panoramic view, Fitzroy National Park, Argentina

Enrique Lopez-Tapia / Everest (8848m) and Nuptse (7879m) last light of sunset, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Last light on the top of Everest (8848m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Last light on the top of Everest (8848m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Last light on the top of Everest (8848m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Last light on the top of Everest (8848m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Last light on the top of Everest (8848m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Last light on Everest (8848m) and Nuptse (7879m). Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Everest (8848m) at sunset, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Everest (8848m) at sunset, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Everest (8848m) and Nuptse (7879m) at sunset, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Everest (8848m) at sunset, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Everest (8848m), Lhotse (8501m) and Makalu (8463m) seen at sunrise from Gokyo Ri (5360m) Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Everest (8848m), Lhotse (8501m) and Makalu (8463m) seen at sunrise from Gokyo Ri (5360m) Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Nuptse Himal, Khumbu valley. Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Pumori Peak (7145 m), Khumbu valley. Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Sunset on Cho Oyu (8201 m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Sunset on Cho Oyu (8201 m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Everest and Lhotse viewed from buddhist stupa, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Ama Dablam (6856m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Moon over the mountains in Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Lights inside tents at night at Tagnag Camp (4.800 m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Everest (8848m) peak bathed in evening light, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Ama Dablam (6.856 m) surrounded by clouds, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Last light on the top of Everest (8848m), Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Last light on the top of Everest (8848m), with Nuptse in shadow, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Enrique Lopez-Tapia / Looking down on glacial lake in the mountains, Manaslu Conservation Area, Himalayas, Nepal, October 2009.

Enrique Lopez-Tapia / Sunrise on the Naike Peak (6.211m), Manaslu Conservation Area, Himalayas, Nepal, October 2009.

Enrique Lopez-Tapia / Sunrise on the Naike Peak (6.211m) Manaslu Conservation Area, Himalayas, Nepal, October 2009.

Enrique Lopez-Tapia / Sunrise at the Lajyung Himal, Larke glacier (4800m) Manaslu Conservation Area, Himalayas, Nepal, October 2009.

Enrique Lopez-Tapia / Manaslu Himal (8.163m) from Samagaon village (3.530m). Manaslu Conservation Area, Himalayas, Nepal, October 2009.

Enrique Lopez-Tapia / Manaslu Himal (8.163m) from Samagaon village (3.530m). Manaslu Conservation Area, Himalayas, Nepal, October 2009.

David Pattyn / Mountains covered in snow, Aiguille du Tour with Tower Glacier infront, Chamonix, France, winter of December 2011

Philippe Clement / The Pic du Midi d'Ossau (2,884 m), a mountain in the Pyrenees-Atlantiques, Pyrenees, France, June 2012

Philippe Clement / The Pic du Midi d'Ossau (2,884 m), a mountain in the Pyrenees-Atlantiques, Pyrenees, France, June 2012

Philippe Clement / Mountain ranges at sunrise, seen east from the Col de Portel, Midi-Pyrénées, Pyrenees, France, June 2012

Philippe Clement / View over the Cirque de Gourette and the Massif du Ger at sunrise, seen from the Col d'Aubisque in the Pyrenees-Atlantiques, Pyrenees, France, June 2012

Philippe Clement / View over the Cirque de Gourette and the Massif du Ger seen from the Col d'Aubisque in the Pyrenees, France, June 2012

Konstantin Mikhailov / Scenic view from Mt. Rainier Sunrise point to the eastern ridges, Governors ridge, Crystal Mountain, Norse Peak of Cascade Range at sunrise, Mt. Rainier National Park, Washington, USA, North America,...

Gerrit Vyn / Liberty Bell Mountain at Washington Pass in the North Cascades, in winter, Okanogan National Forest, Washington, USA, November 2011

Piotr Naskrecki / Katydid (Phyllophora sp) leg with ridges used to produce hissing sound when rubbed against the sternum, Papua New Guinea

Bryan and Cherry Alexander / Snowy slope illuminated by shaft of light in the Ush Urekchen mountains. Chukotka, Siberia, Russia, 1994. 40 BELOW bookplate.

Bryan and Cherry Alexander / Ridges and dimples on an iceberg, Antarctica.

Bryan and Cherry Alexander / Herd of Reindeer / caribou (Rangifer tarandus) being driven along ridge near their winter pastures on the Chukotskiy Peninsula. Chukotka, Siberia, Russia, 2010

Bryan and Cherry Alexander / Herd of Reindeer / caribou (Rangifer tarandus) being driven along ridge near their winter pastures on the Chukotskiy Peninsula. Chukotka, Siberia, Russia, 2010

Bryan and Cherry Alexander / Refrozen crack and small pressure ridges in the sea ice in Erebus and Terror Gulf, Antarctica, October 2006.

Bryan and Cherry Alexander / Branscombe Glacier with Mount Shinn and the Branscombe Ridge on the horizon. Vinson Massif. Antarctica, January 2006.

Konstantin Mikhailov / Denali National Park, the Wonder Lake camp area. A view to Mt. McKinly (Alaska Range) across swampy landscape with White and Black spruces on the Bar Trail. Moose and Spruce Grouse habitat. North Ame...

Konstantin Mikhailov / Famous Denali HW area, typical landscape with rocks, dwarf birches and willows on upland plateau with a view to the ridges of Alaska Range from a south. Denali HighWay (Road 8) leading to Denali NP fr...

Konstantin Mikhailov / Denali National Park, the Wonder Lake, a view to the north. The landscape with mixed forest. North America, ALASKA, USA, September 2009

Konstantin Mikhailov / Denali National Park, the Wonder Lake camp area. A view to Mt. McKinly and Alaska Range. North America, ALASKA, USA, September 2009

Konstantin Mikhailov / Denali National Park, Sanctuary Camp area. A view to Sanctuary River with rocky ridge of Alaska Range at background. A landscape with White and Black spruces and riverside willows. The habitat of Sn...

Konstantin Mikhailov / Denali National Park, the Wonder Lake camp area. A view to Mt. McKinly (Alaska Range) across swampy landscape with White and Black spruces on the Bar Trail. Moose habitat. North America, ALASKA, USA...

Bruno D'Amicis / Aerial view of mountain ridges in the Western Tatras. The Low Tatras can bee seen in the distance. Slovakia, September 2008.

Bruno D'Amicis / Ridges of mountains at the border between Slovakia and Poland. High Tatras, Slovakia. June 2009.

Bruno D'Amicis / Mist rising from forested ridges in the Western Tatras, Slovakia, June.

Doug Perrine / Bryde's whale, (Balaenoptera brydei edeni) head portrait with three ridges clearly visible, Baja California, Mexico, Eastern Pacific Ocean, November

Aflo / Y-6807 Altocumulus clouds above peak in blue sky

Aflo / Y-12206 Timelapse of star paths above Northern Japanese Alps peaks, Japan

Doug Perrine / Bryde's whale (Balaenoptera brydei / edeni) swimming over a bait ball of Sardines, three ridges on forehead that distinguish the Bryde's whale from other mysticetes are prominently visible. Off Baja C...

Neil Lucas / Close up of Giant bamboo (Cathariostachys) stem with ridges, Kyoto, Japan

Neil Lucas / Giant bamboo (Cathariostachys) with fallen snow in ridges, Kyoto, Japan, February 2008

Colin Monteath / Grass covered ridges, Otago, Canterbury, New Zealand

Philippe Clement / Wind forming sand ridges / pioneering dunes behind Marram grass (Ammophila arenaria) on beach, Belgium

Nick Upton / Tide rising over ridges of limestone rock on Vega beach, Ribadesella, Asturias, Spain. July 2009

Barry Mansell / Sand Skink (Neoseps renoldsi) High Sand Ridges, Central Florida, USA - Species of Special Concern

Andy Rouse / Aerial view of ice ridges near the front of Peters Glacier, South Georgia, Antarctica, December 2006

Andy Rouse / Aerial view of ice pressure ridges at edge of Neumayer Glacier, South Georgia, Antarctica, December 2006

Andy Rouse / Aerial view of ice ridges at the front of Peters Glacier, South Georgia, Antarctica, December 2006

Andy Rouse / Aerial view of ice ridges at front of Peters Glacier, South Georgia, Antarctica, December 2006

Andy Rouse / Aerial view of ice ridges near the front of Peters Glacier, South Georgia, Antarctica, December 2006

Andy Rouse / Aerial view of ice ridges near the front of Peters Glacier, South Georgia, Antarctica, December 2006

Nick Upton / Sunset over Pyreneean mountain ridges along France / Spain border.

Jerry Monkman / Patterns in the sand on the beach at the Shifting Lots Preserve, Plymouth, Massachusetts, USA. Owned by the Wildlands Trust. Cape Cod Bay. Near Ellisville Harbor State Park. May 2008