Siesta the donkey greets Sudo the dog in Melbourne, Australia (© Sarah Matray/REX Shutterstock)(Bing Australia)

American bison near Fort Pierre, South Dakota (© Jim Brandenburg/Minden Pictures)(Bing Australia)

Gateshead Millennium Bridge in Newcastle upon Tyne, England (© Graeme Peacock/Alamy)(Bing Australia)

Ship wreckage near Tromsø, Norway (© Daniel Osterkamp/Getty Images)(Bing Australia)

A road to Arenal Volcano National Park in Costa Rica (© Stefano Amantini/Corbis)(Bing Australia)

Cenote Samula near Valladolid, Yucatán Peninsula, Mexico (© ML Sinibaldi/Lithium/age fotostock)(Bing Australia)

Hanging Rock in the Macedon Ranges, Victoria, Australia (© Auscape/Universal Images Group/Getty Images)(Bing Australia)

Interior view of Fukuoka Tower in Fukuoka, Japan (© EQRoy/Shutterstock)(Bing Australia)

Antelope Canyon near Page, Arizona (© S.R.Lee Photo Traveller/Shutterstock)(Bing Australia)

Mononoke Hime no Mori on Yakushima, Japan (© Hiroyuki Nagaoka/Getty Images)(Bing Australia)

African elephants (© James Hager/Offset)(Bing Australia)

Purple-tipped sea anemones off the coast of Vancouver Island, British Columbia, Canada (© Brandon Cole/Offset)(Bing Australia)

Macquarie Lighthouse in Sydney, Australia (© Igor Kasalovic/500px)(Bing Australia)

Macro picture of a variety of bristly haircap moss (© Misja Smits/Buiten-Beeld/plainpicture)(Bing Australia)

The Heart Nebula (© Matthew Russell/Visuals Unlimited, Inc.)(Bing Australia)

U Bein Bridge, Amarapura, Myanmar (© Moment Select/Getty Images)(Bing Australia)

Mulbekh Monastery in the Zanskar region of Ladakh, Jammu and Kashmir, India (© Lethang Photography/Getty Images)(Bing Australia)

Termite mounds in Litchfield National Park, Northern Territory, Australia (© Ingo Arndt/Minden Pictures)(Bing Australia)

Gecko and insect on rainy day, Indonesia (© Shikhei Goh/Getty Images)(Bing Australia)

Warwick Long Bay, Bermuda (© SIME/eStock Photo)(Bing Australia)

A spectacled bear cub in Maquipucuna Cloudforest Reserve, Ecuador (© Pete Oxford/Minden Pictures)(Bing Australia)

Star trails at Cape Woolamai in Victoria, Australia (© Lincoln Harrison/Solent News/Rex Features)(Bing Australia)

Cape gannet diving for fish off Port St. Johns, Wild Coast, Eastern Cape, South Africa (© FLPA/FLPA/SuperStock)(Bing Australia)

Palais Garnier in Paris, France (© John Kellerman/Alamy)(Bing Australia)

The polder landscape near Jisp, Netherlands (© Frans Lemmens/Alamy)(Bing Australia)

Sunset near Ely, Minnesota (© Jim Brandenburg/Minden Pictures)(Bing Australia)

An organic farm in the Roztocze region of Poland (© Marek Piotrowski/Alamy)(Bing Australia)

Metropol Parasol in Seville, Spain (© Felipe Rodriquez/age fotostock)(Bing Australia)

Acacia pycnantha, or Golden Wattle (© Panorama Stock)(Bing Australia)