Metal staircase climbing to rock palace fortress, Sigiriya, UNESCO World Heritage Site, Central Province, Sri Lanka, Asia

The Witch's Finger (Trollkonufingur), Faroe Islands, Denmark, North Atlantic, Europe

Metal staircase climbing to rock palace fortress, Sigiriya, UNESCO World Heritage Site, Central Province, Sri Lanka, Asia

Snow capped peaks including Mount Cika rising above hillside village, Palase, near Dhermi, Albania, Europe

Woman on staircase at the Castle of Gjirokastra, Albania, Europe

Castle Berat on a hill, Berat, Albania, Europe

Aerial view of Gorge Sarakina Meskla, Crete, Greek Islands, Greece, Europe

Perito Moreno Glacier, UNESCO World Heritage Site, around El Calafate, Santa Cruz province, Patagonia, Argentina, South America

Cime des Torches, 2958m, Grand Agnelin, Savoie, Auvergne Rhone-Alpes, France, Europe

Punta Cupetti, top of the mountain, Sardinia, Italy, Mediterranean, Europe

Mount Ararat (5137m), the highest mountain in Turkey

Rock climber rapelling down from an overhang of the summit of Kampenwand, view towards Tyrol, Chiemgau, Upper Bavaria, Bavaria, Germany

Man rock climbing, Oak Creek Canyon, Arizona, USA, North America

Man rock climbing at “The Pit” in Sandy’s Canyon, Flagstaff, Arizona, USA

Man rock climbing, Oak Creek Canyon, Arizona, USA, North America

Tourists climbing Dune 45 in the Namib Desert, most likely the world's most photographed and climbed dune, in the evening, Namib-Naukluft National Park, Namibia, Africa

Ascent of Piz Boe Mountain on the Piazzetta Climbing Route with Marmolada Mountain in the distance, Dolomites, Alto Adige, Italy, Europe

Karwendel Mountain Range, the peaks towards Mt. Bockkar-Spitze and the mountain hut Falkenhuette, Austria. The mountain hut Falkenhuette is a popular destination for climbers, mountainbiker and hiker. The Karwendel limestone mountain range is the largest range in the eastern alps. Large parts of the Karwendel are protected and a popular destination for tourists, hikers and climbers. Europe, Central Europe, Austria, Tyrol, July

Kevin Jorgeson climbing "Fantasia" at Lover's Leap, a popular granite climbing destination near Lake Tahoe in California's Sierra Nevada mountains. The cliff is known for its distinct horizontal quartz dikes which make interesting climbing. This route is considered a risky mental test piece because of its lack of good cracks for protection. It was first climbed in 1973 by Royal Robbins and Ken Wilson.

Glacier campsite with illuminated tents at Mount Shuksan, North Cascades National Park, Washington State, USA

A woman hangs on the side of boulder in the Valley of the Gods, Utah, United States of America

Tail of leopard (Panthera pardus) hangs down while climbing tree, Serengeti, Tanzania

Team of hikers climb Scotland's Ben Nevis peak, Ben Nevis, Scotland

Travelers exploring the famous Franz Josef Glacier with its, blue ice caves, deep crevasses and tunnels that mark the ever changing ice formations; West Coast, New Zealand

Blue wildebeest (Connochaetes taurinus) rushing up steep sandy gully in Serengeti National Park, Tanzania

Orangutan (Pongo species) hanging sideways from a tree branch and holding a banana in it's hand in Tanjung Puting National Park, Central Kalimantan, West Kotawaringin Regency, Indonesia

Orangutan (Pongo species) in a tree in Tanjung Puting National Park, Central Kalimantan, West Kotawaringin Regency, Indonesia

Ape hanging of a tree in the rainforest of Mount Halimun Salak National Park in Indonesia, West Java, Indonesia

Orangutan (Pongo species) climbing a tree and eating a banana in Tanjung Puting National Park, Central Kalimantan, West Kotawaringin Regency, Indonesia

Olive baboon (Papio anubis) climbs tree trunk watching camera in Serengeti National Park, Tanzania

Low angle view of an Ape climbing between trees in the rainforest of Mount Halimun Salak National Park in Indonesia, West Java, Indonesia

Orangutan (Pongo species) sitting on a tree branch and eating in Tanjung Puting National Park, Central Kalimantan, West Kotawaringin Regency, Indonesia

Ape hanging on a tree trunk in the rainforest of Mount Halimun Salak National Park in Indonesia, West Java, Indonesia

Orangutan (Pongo species) in a tree in Tanjung Puting National Park, Central Kalimantan, West Kotawaringin Regency, Indonesia

Climbing metal steps up volcanic rock in the rain; Snaefellsbaer, Western Region, Iceland

Orangutan (Pongo species) with a mouthful of bananas in Tanjung Puting National Park, Central Kalimantan, West Kotawaringin Regency, Indonesia

Orangutan (Pongo species) with a mouthful of bananas in Tanjung Puting National Park, Central Kalimantan, West Kotawaringin Regency, Indonesia

Lion cub (Panthera leo) looks back climbing tree trunk, Grumeti Serengeti Tented Camp, Serengeti National Park; Tanzania

Orangutan (Pongo species) hanging sideways from a tree branch and eating a banana in Tanjung Puting National Park, Central Kalimantan, West Kotawaringin Regency, Indonesia

A teenage girl clings to a leaning tree trunk, Belize

Ice climber on frozen waterfalls on a cliff of a mountain, Banff National Park; Lake Louise, Alberta, Canada

Overhead view of a woman climbing over the slippery, wet rocks along the rushing stream at Trafalgar Falls on the Caribbean Island of Dominica in Morne Trois Pitons National Park, Dominica, Caribbean

Tonina, pre-Columbian archaeological site and ruined city of the Maya civilization; Chiapas, Mexico

A black bear (Ursus americanus) cub hanging onto a branch at the top of a tree against a blue sky; Alaska, United States of America

Jackson's Chameleon (Trioceros jacksonii) sitting on a tree branch; Kihei, Maui, Hawaii, United States of America

Herd of Wildebeest (Connochaetes taurinus) crossing the Mara River and climbing out on the far bank in Serengeti National Park, Tanzania

Jackson's Chameleon (Trioceros jacksonii) sitting on a tree branch; Kihei, Maui, Hawaii, United States of America

A Young Woman Climbs Steps Towards The Cape Spear Lighthouse, St. John's, Newfoundland And Labrador, Canada

Lion cub (Panthera leo) clutches tree trunk looking up, Grumeti Serengeti Tented Camp, Serengeti National Park; Tanzania

A female tourist poses on the basalt rock columns on the Reynisfjara beach in Southern Iceland, Iceland

Cheetah cub (Acinonyx jubatus) pulls back another climbing tree, Maasai Mara National Reserve, Kenya

Annual balloon fiesta colourful hot air balloons in flight, Albuquerque, New Mexico, United States of America

Annual balloon fiesta colourful hot air balloons in flight with owl shaped balloon part seen in the foreground, Albuquerque, New Mexico, United States of America

Annual balloon fiesta colourful hot air balloons in flight, Albuquerque, New Mexico, United States of America