Christophe Courteau / Mountain gorilla silverback, male called Munyinya, (Gorilla beringei) with tourist taking photo, part of Hirwa Group, Volcanoes National Park, Rwanda

Rob Jordan / 2020VISION / Atlantic salmon (Salmo salar) leaping up the cauld at Philphaugh Salmon Viewing Centre near Selkirk, where members of the public can view the spectacle, Selkirkshire, Scotland, UK, October 2011

Tim Fitzharris / Tourists viewing Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Andrew Walmsley / A tourist viewing through hide window over coastal landscape. Kaikoura, New Zealand, October.

Ingo Arndt / Tourists viewing Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Mark Carwardine / Lowering diving cage into the sea for viewing Great white shark, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Lowering diving cage into the sea for viewing Great white shark, Guadalupe Island, Mexico (North Pacific)

Enrique Lopez-Tapia / Wildlife viewing platform, with chital deer (Axis axis) in the distance, Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh. UNESCO World Heritage Site. June 2012.

Roy Mangersnes / Tourists looking at wildlife from a dedicated viewing boat on the Chobe River, Botswana, November

David Woodfall / Farmed Bison (Bison Bison) males sparring in the snow, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) standing next to a river in the snow, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) group standing next to a river in the snow, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) standiing around a feeding trough in the snow, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) head portrait in the snow, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) feeding on hay, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) head portrait in the snow, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) head portrait,reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) in the snow, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

David Woodfall / Farmed Bison (Bison Bison) head portrait in the snow, reared for their meat and tourist viewing, Corwen, N Wales, herd originating in Eire.

Terry Whittaker / 2020VISION / Birdwatchers looking at birds from a viewing hide on an organised birdwatching event led by RSPB PR Officer Howard Vaughan, Rainham Marshes RSPB Reserve, RSPB Greater Thames Futurescapes Project, Rain...

Terry Whittaker / 2020VISION / Birdwatchers looking at birds from a viewing hide on an organised birdwatching event led by RSPB PR Officer Howard Vaughan, Rainham Marshes RSPB Reserve, RSPB Greater Thames Futurescapes Project, Rain...

Terry Whittaker / 2020VISION / Birdwatcher entering a viewing hide on an organised birdwatching event led by RSPB PR Officer Howard Vaughan, Rainham Marshes RSPB Reserve, RSPB Greater Thames Futurescapes Project, Rainham, Essex, UK...

Terry Whittaker / 2020VISION / Birdwatchers entering a viewing hide on an organised birdwatching event led by RSPB PR Officer Howard Vaughan, Rainham Marshes RSPB Reserve, RSPB Greater Thames Futurescapes Project, Rainham, Essex, U...

Michael W. Richards / Bengal tiger (Panthera tigris tigris) watched by tourists on Indian elephant (Elephas maximus) as part of 'tiger show', Pench National Park, Madhya Pradesh, Indian 2006

Paul Harris / 2020VISION / Farmer, Raff Ponsillo, viewing Domestic cattle from back of jeep, herd of conservation grazing cattle on Tealham Moor, Somerset Levels, UK, June 2011

Paul Harris / 2020VISION / Somerset Wildlife Trust officer, David Leach, and Farmer, Raff Ponsillo, viewing domestic cattle and discussing conservation grazing programme on Tealham Moor, Somerset Levels, UK, June 2011

Paul Harris / 2020VISION / Somerset Wildlife Trust officer, David Leach, and Farmer, Raff Ponsillo, viewing domestic cattle and discussing conservation grazing programme on Tealham Moor, Somerset Levels, UK, June 2011

Paul Harris / 2020VISION / Somerset Wildlife Trust officer, David Leach, and Farmer, Raff Ponsillo, viewing domestic cattle, herd of conservation grazing cattle on Tealham Moor, Somerset Levels, UK, June 2011

Paul Harris / 2020VISION / Somerset Wildlife Trust officer, David Leach, and Farmer, Raff Ponsillo, viewing domestic cattle, herd of conservation grazing cattle on Tealham Moor, Somerset Levels, UK, June 2011

Roberto Rinaldi / Diver viewing Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy

Roberto Rinaldi / Diver viewing mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy

Andrew Parkinson / 2020VISION / Marsh harrier (Circus aeruginosus) adult female in flight over reedbed in front of viewing hide, Norfolk, UK, April

Hiroya Minakuchi / Lion's Mane (Cyanea capillata) jelly from overhead viewing the bell, Prince William Sound, Alaska

Terry Whittaker / 2020VISION / Young woman cyclist standing on stone wall viewing Rutland Water, Rutland, UK, April 2011, Model released

Terry Whittaker / 2020VISION / Young woman cyclist standing on stone wall viewing Rutland Water, Rutland, UK, April 2011, Model released.

Terry Whittaker / 2020VISION / Young man viewing Rutland Water with binoculars from bird hide, Rutland, UK, April 2011

Shattil & Rozinski / Tourists on boardwalk viewing platform watching salmon spawning along a stream and waterfall in Ketchikan, Alaska, USA. September 2010. A fish ladder to the side of the stream creates an easier route...

Oriol Alamany / Tourists viewing Spegazzini Glacier from a ship, Los Glaciares National Park, Patagonia, Argentina, January 2006

Tim Laman / Girl (two years) viewing a captive Mountain Lion / Puma (Felis concolor) through glass enclosure at Stone Zoo, Massachusetts, USA, November 2005, Model released

Tom Gilks / Viewing window at the Wildfowl and Wetland Trust's (WWT) London Wetland Centre with young woman birdwatching, London, UK, 2009

Edwin Giesbers / Rear view of a Siberian tiger (Panthera tigris altaica) in a captive zoo setting with children viewing the enclosure through glass, Europe

Dave Bevan / Dyfi-Ynyslas NNR wooden viewing point on reserve, inspired by the banded snail, Wales, UK

David Woodfall / Tourists viewing the Taj Mahal, tomb of Humayan, Uttar Pradesh, India, November 2008

David Woodfall / Tourists viewing the Taj Mahal, tomb of Humayan, Uttar Pradesh, India, October 2008

Oriol Alamany / Visitors viewing exhibition at the Visitor Information Centre, Wadi Rum protected Area, Jordan, April 2009

Michael Hutchinson / Tourists on viewing platform dwarfed by Iguazu falls including Garganta del Diablo (Devil's throat), Iguacu National Park, Argentina February 2009

Michael Hutchinson / People on viewing platform dwarfed by Iguazu falls, Iguacu National Park, Argentina February 2009

Michael Hutchinson / Man on viewing platform watching the Iguazu waterfall, Iguaçu National Park, Brazil

Martin Gabriel / Lake Lugano (Lago di Lugano) from viewing platform at Monte San Salvatore near Lugano, Alps, Switzerland, September 2008

Juergen Freund / Diver viewing coral reef with Featherstars, Tonga, Melanesia, Pacific

Scott Leslie / Tourists on boardwalk and viewing platform, Everglades National Park, Florida

Juan Carlos Munoz / Tourists viewing wildlife from a rainforest canopy walkway, Danum Valley forest reserve, Sabah, Borneo, Malaysia

Juan Carlos Munoz / Tourists viewing wildlife from a rainforest canopy walkway, Danum Valley forest reserve, Sabah, Borneo, Malaysia

Juan Carlos Munoz / Toruists on Canopy walkway and viewing balcony in rainforest canopy, Danum Valley reserve, Sabah, Borneo, Malaysia 2007

Juan Carlos Munoz / Tourists viewing the rainforest from the terrace of a wildlife lodge, Danum valley forest reserve, Sabah, Borneo, Malaysia 2007

Juan Carlos Munoz / Tourists viewing lowland rainforest from boat, River Sungai Kinabatangan, Sabah, Borneo, Malaysia 2007

Juan Carlos Munoz / Tourists viewing lowland rainforest from boat, River Sungai Kinabatangan, Sabah, Borneo, Malaysia 2007

Juan Carlos Munoz / Tourists viewing the canyon walls by boat, Lake Powell, Glen Canyon NP, Arizona, USA

Juan Carlos Munoz / Tourists viewing the canyon walls by boat, Lake Powell, Glen Canyon NP, Arizona, USA

Juan Carlos Munoz / Visitor viewing Dinosaurs at the Royal Tyrrell Museum, Drumheller, Alberta, Canada

Rick Tomlinson / Viewing a tabular iceberg from the crow's nest of SY "Adele", 180 foot Hoek Design, in Bransfield Strait, 17 January 2007. Non editorial uses must be cleared individually.

Michele Westmorland / Brown hyaena (Hyaena brunnea) rare viewing on the Skeleton Coast, Namibia

Luiz Claudio Marigo / Tourists viewing the Giant Water Lilies (Victoria regia) during tour to the meeting of the waters and the Amazon Rainforest, near Manaus city, Amazonas State, Northern Brazil.

Jason Smalley / Bird watchers viewing Eagle Owls, Forest of Bowland, Lancashire, UK

Jason Smalley / School children pond dipping from a viewing platform, UK

Juergen Freund / Tourist viewing the ancient aboriginal Wandjina rock art in cave, Bigge Island, Western Australia

Juergen Freund / Women viewing shark at Reef Headquarters Aquarium, Townsville, Queensland, Australia

Mark Taylor / Tourists in zodiac boat viewing icebergs. Antarctica.

Martha Holmes / Tourists viewing Grey glacier, Torres del Paine NP, Chile

Pete Oxford / Game viewing on the Zambezi river, Zimbabwe, Africa

Nick Garbutt / Tourists watching wildlife around a waterhole from viewing balcony, Mountain Lodge, Mount Kenya National Park, Kenya

Pete Oxford / Galapagos Land Iguana (Conolophus subcristatus) with tourists, Urbina Bay, Isabella Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Sea Lion (Zalophus wollebaeki) group on beach with tourists, Espanola (Hood) Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Sea Lion (Zalophus wollebaeki) group on beach with tourist, Espanola (Hood) Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Sea Lion (Zalophus wollebaeki) sunning with three tourists, Espanola (Hood) Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Sea Lion (Zalophus wollebaeki) one looking at tourists, Espanola (Hood) Island, Galapagos Islands, Ecuador

Juergen Freund / Snorkeler viewing coral reef Palawan, Phillipines

Juan Manuel Borrero / People in viewing hut, Huacarpay lake, Vilcanota Mountain range, Peru 2006.

Colin Monteath / Tourists cruise past iceberg, Dumont d'Urville, Terre Adelie Land, east Antarctica

Pete Oxford / Los Gemelos or The Twins are two craters in the highlands of Santa Cruz Island, Galapagos Islands, Ecuador

Willem Kolvoort / Woman viewing shells of the Land snail {Polymita picta} showing colour variation, endemic to the far East of Cuba near Baracoa, Museum of Holguin, Cuba 1993.

Pete Oxford / Tourists using monoscope to watch birdlife from canopy observation tower, Tiputini biodiversity research, Yasuni NP, Ecuador

Richard Du Toit / Safari vehicles viewing Buffalo herd {Syncerus caffer} at dusk, South Africa

Julia Bayne / Viewing platform at Asa Wright Nature Centre, Trinidad, Caribbean, world famous not-for-profit ecolodge established in 1960s.

Jabruson / People watching Cape buffalo herd {Synceros caffer} from elephant back, rare use of African elephants for tourism viewing, Garamba NP, Democratic Republic of Congo, Central Africa

Pete Oxford / Bird viewing from boat, Keoladeo Ghana NP, Bharatpur, Rajasthan, India

Pete Oxford / Bird viewing from boats, Keoladeo Ghana NP, Bharatpur, Rajasthan, India

E.A. KUTTAPAN / Tourists viewing wild Bengal tiger (Panthera tigris tigris) from back of domestic Indian elephant (Elephas maximus) Bandhavgarh NP, Madhya Pradesh, India

Pete Oxford / Bird viewing from boat, Keoladeo Ghana NP, Bharatpur, Rajasthan, India

Richard Du Toit / African Elephant and young (Loxodonta africana) about to cross the road infront of safari / game viewing vehicles, South Africa

Martha Holmes / Naturalists viewing game from tree hide in swamp during rainy season, Kasamka NP, Zambia.

Sharon Heald / Baby Indian elephant {Elephas maximus} captive, will be trained to carry tourists for viewing Tigers. Bandhavgarh NP, India.

Doug Perrine / Diver viewing Sponges, Bahamas

Karl Ammann / Wildlife viewing area overlooking bai / clearing in forest, Dzanga Sangha

Richard Du Toit / Tourists watching African elephants at Chobe river, Botswana

Richard Du Toit / Tourists watching African elephants from boat on Chobe river, Botswana