Interior of the Colosseum in Rome, Italy (© Ken Kaminesky/Corbis)(Bing Australia)

Green heron in Washington Park Arboretum in Seattle, Washington (© Caren Brinkema/SuperStock)(Bing Australia)

Colorful homes line Nyhavn Canal in Copenhagen, Denmark (© Benjeev Rendhava/Getty Images)(Bing Australia)

Rapa River Valley in Sarek National Park, Norbotten County, Sweden (© Johan Assarsson/Getty Images)(Bing Australia)

Ceiling detail at the entrance to Kyoto Station, Kyoto, Japan (© Ocean/Corbis)(Bing Australia)

Trees in sweaters, Blanton Museum Of Art, University Of Texas, Austin, Texas (© Inga Spence/Alamy)(Bing Australia)

Kelp at low tide, Bay of Fundy, Nova Scotia, Canada (© Michelle Valberg/Corbis)(Bing Australia)

Spring flowers in Alentejo, Portugal (© Luis Quinta/Minden Pictures(Bing Australia)

Kona Coast, Big Island, Hawaii (© Bob Glusic/Wilderness Video)(Bing Australia)

Duanwu Festival (Dragon Boat Festival), Liuzhou, Guangxi Zhuang Autonomous Region, China (© Imaginechina/Corbis)(Bing Australia)

Mangrove seen from underwater, Aldabra, Seychelles (© Expeditieteam Aldabra/Foto Natura/Minden Pictures)(Bing Australia)

Sunset over the Garonne River in Toulouse, France (© Richard Fairless/Getty Images)(Bing Australia)

Schooling bigeye trevallies off the coast of Bali, Indonesia (© David Fleetham/Visuals Unlimited, Inc.)(Bing Australia)

Adult male mountain gorilla and juvenile in Volcanoes National Park, Rwanda (© Doug Steakley/Getty Images)(Bing Australia)

Lulworth Cove along Jurassic Coast, England (© SIME/eStock Photo)(Bing Australia)

Silky anteater near Penonomé in Coclé province, Republic of Panama (© Zizza Gordon/Alamy)(Bing Australia)

Clouds above Los Cuernos and Lake Pehoé in Torres del Paine, Chile (© Marcio Cabral/360cities.net)(Bing Australia)

Beartown State Park in Monongahela National Forest, West Virginia (© Jerry Whaley/age fotostock)(Bing Australia)

Stained-glass ceiling of the Palau de la Musica Catalana, Barcelona, Spain (© Ocean/Corbis)(Bing Australia)

Bear Lakes Basin on the Sierra High Route, California (© Rachid Dahnoun/Aurora Photos)(Bing Australia)

Ruins in Safed, Israel (© Noam Armonn/Corbis)(Bing Australia)

Thunderstorm near Coffee Bay on the Wild Coast region of South Africa (© Jon Hicks/Corbis)(Bing Australia)

Day octopus (Octopus cyanea) in the water near Lanai, Hawaii (© David Fleetham/Visuals Unlimited, Inc.)(Bing Australia)

Haystack Rock, Cannon Beach, Oregon (© Clipcanvas)(Bing Australia)

Staircase inside the Île Vierge lighthouse, Brittany, France (© Stefano Torrione/SIME/4Corners)(Bing Australia)

Northern gannet at Bonaventure Island and Percé Rock National Park, Quebec, Canada (© Arthur Morris/Corbis)(Bing Australia)

Cliff Palace in Mesa Verde National Park, Colorado (© George H.H. Huey/Alamy)(Bing Australia)

Bridge over a marshland near the Khongoryn Els Sand Dunes in the Gobi Desert, Mongolia (© Franck Guiziou/Hemis/Corbis)(Bing Australia)

Aerial of Mackenzie River delta, Northwest Territories, Canada (© J.A. Kraulis/Corbis)(Bing Australia)