Mountain guide traversing a crevasse, Island Peak, 6189m, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Trekking tour guide walking at Oukaimeden ski resort in summer, High Atlas Mountains, Morocco, North Africa, Africa

Train of cogwheel railway at Schynige Platte, Jungfrau Region, Bernese Oberland, Switzerland

Tour guide trekking in the Imlil valley, on route from Tizi n Tamatert into Imlil, High Atlas Mountains, Morocco, North Africa, Africa

Prospector and Guide Monument, Skagway, Alaska, United States of America, North America

A group of trekkers with their local guide descending in Barranco Camp on the Machame Route on Mount Kilimanjaro, Tanzania, East Africa, Africa

Tour guide trekking between Tacheddirt and Tizi n Tamatert, High Atlas Mountains, Morocco, North Africa, Africa

A high altitude porter carries a heavy load using the traditional basket and tump (headband) used by the Nepali porters, under Mera Peak, 6420 metres, a popular trekking peak in the Khumbu region, near Mount Everest, Himalayas, Nepal, Asia

Stele in memory of guide Sepp Innerkofler, 1865-1915, near A.Locatelli-S.Innerkofler refuge, Three Peaks Nature Park, Dolomites, South Tyrol, Italy

Abdullah, guide of the Museum, posing at Nizwa Fort, Ad Dakhiliyah Region, Sultanate of Oman, Arabian Peninsula

Mountain bikes and man offering camel ride at foot of Tinfou dunes, near Tamegroute, Draa River valley, Zagora Province, Draa-Tafilalet region, Morocco

Electric mountain bike rider crossing river ford on track between Ouarzazate and Ait Ben Haddou, Ounila River valley, Ouarzazate Province, Draa-Tafilalet, Morocco

Guide explaining geography with a map to a tourist group, in front of the Turkish border and Mount Ararat at Khor Virap Monastery, Ararat plain, Artashat, Armenia, Eurasia

Sherpa guide walking over Cho La Pass with Ama Dablam on left and Arakam Tse on right side, Solukhumbu District, Nepal, Himalayas, Asia

Gaucho guide and tourist on horse at Estancia Alta Vista, El Calafate, Parque Nacional Los Glaciares, UNESCO World Heritage Site, Patagonia, Argentina, South America

Tourist climbers follow guide ropes towards Low's Peak, the 4101m summit of Mount Kinabalu, Sabah, island of Borneo, Malaysia, Southeast Asia, Asia

Saint-Gervais traditional mountain guides festival, alphorn players, Saint-Gervais-les-Bains, Haute Savoie, France, Europe

Cross and statue of mountain guide dog, Courmayeur, Val d'Aoste, Italy, Europe

Ice Climbing in Pyha, Lapland, Finland

Guide watches as woman crosses rope bridge, karst landscape in Tsingy de Bemaraha National Park, Madagascar, Mahajanga Province, Africa, UNESCO World Heritage Site

Mountain Guide climbing down the metal steps, morning light, Oberaarjoch hut, Wallis, Switzerland

monks study the reprint of a trourist guide from 1932 of Emei Shan, Xixiang Chi monastery and temple, Elephant Bathing Pool, World Heritage Site, UNESCO, China, Asia

Girl and mountain guide in front of a waterfall, Gossensass, Brenner, South Tyrol, Trentino-Alto Adige/Suedtirol, Italy

Tourist group, yellow coats, view from peak, Huang Shan, Anhui province, World Heritage, UNESCO, China, Asia

pilgrims, Tiantai Feng, Mount Jiuhua, mountain of nine flowers, Jiuhua Shan, Anhui province, China, Asia

Mountain guide shoveling snow, checking danger of avalanches, Bavaria

Caravan in the evening light promoting tours, Travel guide, Monument Valley, Arizona, USA

Mountain guide in crevassedes, Brokarjoekull Glacier, Island

Two mountain climbers in a cave at Schoberl, Hallstaetter Glacier, Dachstein, Austria

Mountain climbing lesson. Dachstein Glacier, Austria

Mountain guide checking snow, danger of avalanches, Oberstdorf, Bavaria, Germany

Mountain guide Vern Tejas and Lhakpa Rita Sherpa with tibetan praying flags on the summit of Mount Everest 8848m, Himalaya, Nepal

Mountaineer and local guide at the ascent to the summit of the Kilimanjaro via the Western Breach route, Tanzania, Africa

Signpost Cuernos and Chileno, Mirador Las Torres, Torres del Paine National Park, Patagonia, Chile, South America

Indio mountain guide with hat and poncho in the Andes, near Cusco, Peru, South America

Guide for mountain hikers, Texel Group nature Park, Passeier Valley, Oetztal Alps, South Tyrol, Italy, Europe

Mountain guide guiding a young woman on a short rope through a rock face, Wiederroute, Watzmann, Schonau am Konigsee, Berchtesgadener Land, Bavaria, Germany, Europe

Explorer in the blue ice caves in Jˆkuls·rlÛn glacier, Iceland, North Atlantic Ocean

Oct 29, 2008 Hoh National Forest, Forks, Washington Early morning flyfishing for steelhead on the Hoh River with Emerald Water Anglers guide Shannon Carroll among the old growth that still exists within the Park. The Hoh river is a pristine glacial Olympic river and is one of the best salmon fisheries on the west coast of the United States, with runs of Steelhead, coho, chinook, and pink salmon. Note: Emerald Water Anglers, as a conservation policy, only fish steelhead in the Olympic rivers, United States of America

Oct 29, 2008 Hoh National Forest, Forks, Washington Early morning flyfishing for steelhead on the Hoh River with Emerald Water Anglers guide Shannon Carroll among the old growth that still exists within the Park. The Hoh river is a pristine glacial Olympic river and is one of the best salmon fisheries on the west coast of the United States, with runs of Steelhead, coho, chinook, and pink salmon. Note: Emerald Water Anglers, as a conservation policy, only fish steelhead in the Olympic rivers, United States of America

Portrait of a Kazakh Nomad in traditional dressing. Most of the nomads living in the Tavanbogd Atlai National Park are Kazakhs.

A climber with two ice axes

A group of backcountry skiers follow their guide down a slope in the Selkirk Mountains, Canada.

Two climbers at the top of a summit in the Alps.

Panoramic of high mountain peaks in the Alps.

Two mountaineers at the top of a peak in Switzerland at sunset.

Mountain guide on the top of a peak.

The Italian Guide Standing On Exposed Ridge Near The Summit Of Punta Anna

The Italian Guide Standing On Exposed Ridge Near The Summit Of Punta Anna

A man ascending a mountain.

A manned lighthouse station on Entrance Island, near Nanaimo in the Georgia Straight, guides ferry traffic towards the harbour, Nanaimo, British Columbia, Canada

Wagon Train

Mountaineers On Mountain

A tourist information sign at Snaefellsjokull National Park in Western Iceland, Iceland

Machu Picchu tourist group with guide visiting the ancient city enormous numbers of tourists come to the site each year, Highlands, Peru

Machu Picchu tourist group with guide visiting the ancient city enormous numbers of tourists come to the site each year, Highlands, Peru