Ingo Arndt / Sun hitting the peak of The Matterhorn (4478m) at sunrise with reflection in Lake Riffelsee, Switzerland

Andy Trowbridge / Matterhorn (4,478m) at sunrise, with reflection in Lake Stellisee, Zermatt, Switzerland, September 2012.

Benjamin Barthelemy / Banner cloud formation around the summit of the Matterhorn (4,478m), Switzerland, September 2011.

Inaki Relanzon / Lower peaks of the Mont Cervin / Monte Cervino / The Matterhorn massif, Pennine Alps, Switzerland / France border, April 2011.

Stefan Huwiler / Matterhorn at sunrise in autumn with reflection in the Riffelsee. Zermatt, Valais, Switzerland, Europe, October 2008.

Stefan Huwiler / Matterhorn at sunrise in autumn with reflection in the Riffelsee. Zermatt, Valais, Switzerland, Europe, October 2008.

Stefan Huwiler / Matterhorn at sunrise in autumn with reflection in the Riffelsee. Zermatt, Valais, Switzerland, Europe, October 2008.

Wild Wonders of Europe / Popp-Ha / Matterhorn (4,478m) with reflection in Lake Riffel at sunrise, Switzerland, September 2008. WWE BOOK. WWE OUTDOOR EXHIBITION. NOT TO BE USED FOR GREETING CARDS OR CALENDARS TILL 2013 PRESS IMAGE.

Wild Wonders of Europe / Popp-Ha / Matterhorn (4,478m) with reflection in Lake Riffel at sunrise, Switzerland, September 2008

Wild Wonders of Europe / Popp-Ha / Matterhorn (4,478m) at sunrise with reflection in Riffel Lake, Wallis, Switzerland, September 2008

Wild Wonders of Europe / Popp-Ha / Matterhorn (4,478m) at night, with star trails, from Gornergrat, Wallis, Switzerland, September 2008

Wild Wonders of Europe / Popp-Ha / Matterhorn (4,478m) at night, long exposure with star trails, viewed from Gornergrat, Switzerland, September 2008, climbers in foreground with headlamps setting off to climb the Matterhorn from Hornli...

Wild Wonders of Europe / Popp-Ha / Matterhorn (4,478m) with reflection in Grindji lake at sunrise, Wallis, Switzerland, September 2008

Wild Wonders of Europe / Popp-Ha / Matterhorn (4,478m) silhouetted at sunset, viewed from Gornergrat, Wallis, Switzerland, September 2008

Rolf Nussbaumer / Matterhorn at dawn, Zermatt, Swiss Alps, Switzerland

Gavin Hellier / Zermatt in the Alps with The Matterhorn in the background, Switzerland

John Downer / Golden eagle portrait with Matterhorn in background, Italy

John Downer / Matterhorn mountain in the Alps, Nr Zermatt Switzerland

Christoph Becker / Matterhorn mountain with sun on upper slopes. Switzerland

Loic Poidevin / View of the Matternhorn from Zermatt, Switzerland, September 2018.

Loic Poidevin / Cloud round the Matterhorn seen from Gornergrat, Valais, Switzerland, September 2018.

Loic Poidevin / Observatory of Gornergrat, Mont Cervin, Matterhorn, Swiss Alps, Valais, Switzerland, September 2018.

Loic Poidevin / Matterhorn at Zermatt, Valais,Switzerland, September 2018.

Chase Dekker / Mountain reflected in lake, Matterhorn, Stellisee, Zermatt, Switzerland

Chase Dekker / Peak in clouds, Matterhorn, Zermatt, Switzerland

Chase Dekker / Mountain reflected in lake, Matterhorn, Grindjisee, Zermatt, Switzerland

Chase Dekker / Lake and mountain, Matterhorn, Grindjisee, Zermatt, Switzerland

Chase Dekker / Mountain reflected in lake, Matterhorn, Grindjisee, Zermatt, Switzerland

Chase Dekker / Peak, Matterhorn, Zermatt, Switzerland

Chase Dekker / Huts and peak, Matterhorn, Findeln, Switzerland

Ashley Cooper / The Gornergrat railway above Zermatt Switzerland. June 2004

Ashley Cooper / The Gornergrat railway above Zermatt Switzerland. June 2004

Ashley Cooper / Sheep cooling down on the snow infront of the Matterhorn above Zermatt Switzerland. June 2004

Ashley Cooper / Person holding a map, with the Matterhorn in the background, above Zermatt, Switzerland. June 2004

Graham Eaton / Matterhorn and Riffelsee, near Zermatt, Switzerland, September 2017.

Graham Eaton / The Matterhorn, near Zermatt, Switzerland, September 2017.

Graham Eaton / Sail clouds developing behind the lee side of the Matterhorn in the afternoon, Zermatt, Switzerland, September. The Hornli ridge is in the foreground.

Graham Eaton / Sail clouds developing behind the lee side of the Matterhorn in the afternoon, Zermatt, Switzerland, September

Graham Eaton / The Matterhorn and Stellisee, near Zermatt, Switzerland, September

Michel Roggo / Gorner Glacier with meltwater channels, and the Matterhorn in the background, Valais Alps, Canton Valais / Wallis, Switzerland 20-08-2013 . Photographed for The Freshwater Project

Michel Roggo / Gorner Glacier with crevasses, and the Matterhorn in distance. Valais Alps, Canton Valais / Wallis, Switzerland, August 2013. Photographed for The Freshwater Project

Ingo Arndt / Sun hitting the peak of The Matterhorn (4478m) at sunrise with reflection in Lake Riffelsee, Switzerland

Ingo Arndt / The Matterhorn (4478m) with reflection in Lake Riffelsee, Switzerland

Ingo Arndt / The Matterhorn (4478m) with reflection in Lake Riffelsee, Switzerland

Ingo Arndt / The Matterhorn (4478m) at night with stars, Switzerland

Ingo Arndt / The Matterhorn peak (4478m) at sunrise, Switzerland

Ingo Arndt / Matterhorn mountain, Alps, Switzerland

Michel Roggo / Meltwater lakes and the Matterhorn in the background, Gornerglacier or Gornergletscher, with Valais Alps, Canton Valais / Wallis, Switzerland, August 2013. Taken for the Freshwater Project.

Andy Trowbridge / Matterhorn (4,478m) in early morning light, taken from Schwarzsee. Zermatt, Switzerland, September.

Thomas Marent / Larch (Larix sp) forest below the Matterhorn, Switzerland

Thomas Marent / Larch (Larix sp) forest around train at the foot of the Matterhorn, Switzerland

Thomas Marent / The Matterhorn reflected in the Riffelsee Lake at dusk, Switzerland

Thomas Marent / Matterhorn reflected in the Riffelsee Lake under a full moon, Switzerland

Thomas Marent / Matterhorn reflected in the Riffelsee Lake under a full moon, Switzerland

Thomas Marent / The Matterhorn, Switzerland

Thomas Marent / The Matterhorn, Switzerland

Benjamin Barthelemy / View of the Matterhorn (4,478m) at sunrise from Stelisee Lake, Switzerland, June 2011..

Benjamin Barthelemy / Matterhorn (4,478m) reflected in Stelisee Lake at sunrise, Switzerland, September 2010.

Benjamin Barthelemy / Matterhorn (4,478m) and moon reflected in Lake Riffel, Switzerland, September 2011.

Benjamin Barthelemy / Matterhorn (4,478m) and moon reflected in Lake Riffel, Switzerland, September 2011.

Andy Trowbridge / Matterhorn (height 4,478m) at sunrise, with reflection in Lake Stellisee. Zermatt, Switzerland, September 2012

Inaki Relanzon / Glacier descending from Monte Rosa and Cervino (The Matterhorn) massif, Pennine Alps, Switzerland, April 2011.

Inaki Relanzon / Gornergrat Station with observatory domes, Monte Rosa and Cervino (The Matterhorn) massif on the horizon, Pennine Alps, Switzerland, April 2011.

Inaki Relanzon / Peak of Mont Cervin / Monte Cervino / The Matterhorn, at 4,478 metres high, Pennine Alps, Switzerland / France border, April 2011.

Inaki Relanzon / Peak of Mont Cervin / Monte Cervino / The Matterhorn, at 4,478 metres high, Pennine Alps, Switzerland / France border, April 2011.

Stefan Huwiler / Matterhorn at sunrise in autumn with reflection in the Riffelsee. Zermatt, Valais, Switzerland, Europe, October 2008.

Stefan Huwiler / Matterhorn at sunrise in autumn with reflection in the Riffelsee. Zermatt, Valais, Switzerland, Europe, October 2008.

Stefan Huwiler / Matterhorn at sunrise in autumn with reflection in the Riffelsee and star-trails. Zermatt, Valais, Switzerland, Europe, October 2008.

Chadden Hunter / Cameraman, Chadden Hunter, filming rope safety expert, Tono De Vivo, describing the dangers of descending into the glacial ice caves ‘moulins', the ice caves that drain meltwater through glaciers, Gor...

Wild Wonders of Europe / Popp-Hackner / Matterhorn (4,478m) with reflection in ice on Riffel Lake, Wallis, Switzerland, September 2008

Philippe Clement / Farmer storing hay in traditional wooden granary / raccard near Findeln, the Matterhorn in the distance, Valais, Switzerland, July 2009

Philippe Clement / Farmer storing hay in traditional wooden granary / raccard near Findeln, the Matterhorn in the distance, Valais, Switzerland, July 2009

Philippe Clement / The Matterhorn viewed from town of Zermatt, Valais, Switzerland, July 2009

Philippe Clement / Panoramic view of the Matterhorn (4,478m) with alpine meadows and pine forests, Valais, Switzerland, July 2009

Philippe Clement / Traditional wooden chalets in Findeln with the Matterhorn behind, Valais, Switzerland, July 2009

Philippe Clement / The Matterhorn (4,478m) viewed from Zermatt, Valais, Switzerland, July 2009

Philippe Clement / Hikers walking through larch forest (Larix decidua) with a view of the Matterhorn (4,478m) Valais, Switzerland, July 2009

Philippe Clement / Traditioanal wooden granaries / raccards and houses in Findeln with the Matterhorn in the distance, Valais, Switzerland, July 2009

Philippe Clement / The Matterhorn (4,478m) with alpine meadows and pine forests, Valais, Switzerland, July 2009

Philippe Clement / Greater knapweed (Centaurea scabiosa) in flower near the Matterhorn, Swiss Alps, Valais, Switzerland, July 2009

Wild Wonders of Europe / Popp-Ha / Matterhorn (4,478m) with reflection in Riffel Lake, at sunrise, Wallis, Switzerland, September 2008

Kirkendall-Spring / Traditional farm buildings of findeln with the Matterhorn in the distance, Alps, Switzerland

Rolf Nussbaumer / Sunrise on Matterhorn, Zermatt, Swiss Alps, Switzerland

Rolf Nussbaumer / Matterhorn reflected in Riffelsee, Zermatt, Swiss Alps, Switzerland

Ingo Arndt / Matterhorn with reflection in Riffelsee Lake, Alps, Switzerland

Ingo Arndt / The Matterhorn with reflection in Riffelsee Lake, Alps, Switzerland

Ingo Arndt / The Matterhorn, Alps, Switzerland

Thomas Marent / First light on the Matterhorn, Switzerland

Thomas Marent / Mountain lake near the Matterhorn, Switzerland

Thomas Marent / Mountain lake near the Matterhorn, Switzerland

Leo & Mandy Dickinson / Brian Mollineaux , Eric Jones & Eddie Birch bivouac Matterhorn, Winter 1976

Christoph Becker / Sun hitting the peak and upper slopes of Matterhorn mountain, Switzerland

John Downer / Aerial view of Matterhorn in the European Alps, near Zermatt, Switzerland

Leo & Mandy Dickinson / Eric Jones on Matterhorn summit, European Alps, Switzerland, 1976

John Downer Productions / Golden eagle feeding {Aquila chrysaetos} Matterhorn, Switzerland. Captive