Polar bears in Torngat Mountains National Park, Canada (© Cavan Images/Offset by Shutterstock)(Bing Australia)

Loch Leum na Luirginn and Loch Cleat seen from the Quiraing, Isle of Skye, Scotland, UK (© Sebastian Wasek/Sime/eStock Photo)(Bing Australia)

Caribou swimming across Alaska's Kobuk River during autumn migration, USA (© Michio Hoshino/Minden Pictures)(Bing Australia)

Albarracín, Spain (© Domingo Leiva/Getty Images)(Bing Australia)

West Indian manatees in Three Sisters Springs, Crystal River National Wildlife Refuge, Florida, USA (© Norbert Probst/Getty Images)(Bing Australia)

Chestnuts inside their husks (© Kai Keisuke/Shutterstock)(Bing Australia)

Derwent Island on Derwentwater in the Lake District National Park, Cumbria, England (© Chris Warren/eStock Photo)(Bing Australia)

An entry from the Castaways Sculpture Awards, 2012 (© Universal Images Group/Superstock)(Bing Australia)

Badlands National Park, South Dakota, USA (© Dennis Frates/Alamy)(Bing Australia)

Poppies projected on the Sydney Opera House sails to mark Remembrance Day (© James D. Morgan/Getty Images)(Bing Australia)

The hills of Barolo vineyards in Piedmont, Italy (© Marco Arduino/eStock Photo)(Bing Australia)

Ravens in a snowstorm near Kuhmo, Finland (© Frans Lemmens/Alamy)(Bing Australia)

Oil lamps being arranged on rangoli during Diwali (© Subir Basak/Getty Images)(Bing Australia)

Lupins on the shores of Lake Tekapo in New Zealand (© Stanislav Kachyna/Shutterstock)(Bing Australia)

The interior of the Abu Simbel Great Temple in Egypt (© George Steinmetz/Getty Images)(Bing Australia)

Andy Goldsworthy's 'Wood Line' installation along Lovers' Lane in the Presidio of San Francisco, California, USA (© Chris LaBasco/Alamy)(Bing Australia)

Inukshuk silhouetted against the Northern Lights in Barren Lands, Northwest Territories, Canada (© Mark Duffy/Alamy)(Bing Australia)

Chestnut-mandibled toucan in nest cavity, Costa Rica (© Greg Basco/Minden Pictures)(Bing Australia)

Aerial view of the Aiguille du Midi in the Mont Blanc massif, France (© Amazing Aerial Agency/Offset by Shutterstock)(Bing Australia)

Nuestra Señora de la Hoz, an old monastery in the Duratón River gorge, Segovia, Castile and León, Spain (© Arco Images GmbH/Alamy)(Bing Australia)

Common cranes in the Drömling wetland in Germany (© Mike Friedrichs/Getty Images)(Bing Australia)

Old Town of Bern, Switzerland (© Simon Zenger/Alamy)(Bing Australia)

Huge waves crashing on rocks along Asilomar State Beach, Pacific Grove, California, USA (© Sheila Haddad/Danita Delimont)(Bing Australia)

A grove of American elm trees in Central Park's Mall, New York City, USA (© AWL Images/Danita Delimont)(Bing Australia)

A Siberian chipmunk on Mount Taisetsu, Hokkaido, Japan (© Ida Toshiaki/Minden Pictures)(Bing Australia)

Kalbarri National Park, Western Australia (© AWL Images/Offset by Shutterstock)(Bing Australia)

Partly snow-covered slope in Val Cervara, an old-growth beech forest, in Abruzzo, Italy (© Bruno D'Amicis/Minden Pictures)(Bing Australia)

Mount Taranaki, Egmont National Park, North Island, New Zealand (© Francesco Vaninetti/plainpicture)(Bing Australia)

Eilean Donan Castle in Scotland (© CBW/Alamy)(Bing Australia)

Aerial view of Cronulla rock pool with incoming waves, New South Wales (© ai_yoshi/iStock/Getty Images Plus)(Bing Australia)