Mackenzie River delta, Northwest Territories, Canada (© J.A. Kraulis/Corbis)(Bing United States)
Ring-tailed cat, Utah (© Getty Images)(Bing United States)
Gettysburg National Military Park, Gettysburg, Pennsylvania (© Tetra Images/Corbis)(Bing United States)
City and County Building illuminated in Civic Center Park, Denver, Colorado (© Blaine Harrington/age fotostock/SuperStock)(Bing United States)
Kermode bear in Great Bear Rainforest (North and Central Coast), British Columbia, Canada (© Ocean/Corbis)(Bing United States)
Palazzo Pubblico in Siena, Tuscany, Italy (© Joseph Calev)(Bing United States)
Blue tit chicks on a branch (© blickwinkel/Alamy)(Bing United States)
Sliding Sands Trail, Haleakalā National Park, Maui, Hawaii (© Ed Freeman/Getty Images)(Bing United States)
Fruiting date palm tree (© Noam Armonn/Corbis)(Bing United States)
Hippopotamus, Masai Mara National Reserve, Kenya (© David Tipling/Alamy)(Bing United States)
Aerial view of North Malé Atoll, Maldives (© Robert Harding Picture Library/Superstock)(Bing United States)
Alpacas near the base of Cotopaxi Volcano, Ecuador (© Steve Bloom Images/Alamy)(Bing United States)
Fireworks over Pont Alexandre III in Paris, France (© AG photographe/Getty Images)(Bing United States)
Pixie-cup lichen growing on a post (© Robert Faller)(Bing United States)
Rotunda of the Smithsonian Institution National Museum of Natural History in Washington, D.C. (© National Geographic Image Collection/Alamy)(Bing United States)
Devils Tower, Wyoming (© David Fortney/Getty Images)(Bing United States)
Havasu Falls in the Grand Canyon, near Supai, Arizona (© Konstantin/360cities.net)(Bing United States)
Longjaw squirrelfish swims against school of horse-eye jacks, Lighthouse Reef, Belize (© Jeff Hunter/Getty Images)(Bing United States)
Oil tanker near Galveston, Texas (© Louis Vest/Getty Images)(Bing United States)
Interior of Liège-Guillemins railway station, Liège, Belgium (© Benjamin Rondel/Corbis)(Bing United States)
Gammaridean amphipods in the waters off Tokyo, Japan (© Atopapa/Corbis)(Bing United States)
Cape Greco sea caves, Cyprus (© DEA/G. M. ROSSI/Getty Images)(Bing United States)
Ducks in a rice field near Ubud, Bali, Indonesia (© SuperStock/age fotostock)(Bing United States)
Jökulsárlón, a glacial lagoon in southeast Iceland (© Getty Images)(Bing United States)
Sea of clouds over Lake Wanaka in Central Otago, Southern Alps, New Zealand (© Colin Monteath/age fotostock)(Bing United States)
Reed fishing boats in Huanchaco, Peru (© Patrick Brandenburg/Tandem Stock)(Bing United States)
New Croton Dam in Croton-on-Hudson, New York (© Greg Miller/Gallery Stock)(Bing United States)
Multnomah Falls and Benson Bridge, Oregon (© Getty Images)(Bing United States)
