Fabra Observatory and Barcelona seen from the hills of Tibidabo, Spain (© SIME/eStock Photo)(Bing United States)
The Murinsel in Graz, Austria (© REX/WestEnd61)(Bing United States)
Map of Earth created by the Global Inventory Modeling and Mapping Studies (GIMMS) project at NASA’s Goddard Space Flight Center (© NASA)(Bing United States)
Gorgonian coral, crinoid, and sponges, Komodo National Park, Indonesia (© Mammoth HD)(Bing United States)
Kanarra Creek Falls in Utah (© Paul Didsayabutra/500px)(Bing United States)
Omaha Beach monument "Les Braves" at Saint-Laurent-sur-Mer, Normandy, France (© NaturePL/SuperStock)(Bing United States)
Lightning storm off Cooke Point, Port Hedland, Australia (© Simon Phelps Photography/Getty Images)(Bing United States)
Observatory on the summit of Brasstown Bald Mountain in Georgia (© Sean Pavone/Alamy)(Bing United States)
Kayakers in Ashlu Creek near Squamish, British Columbia, Canada (© Phil Tifo/Tandem Stock)(Bing United States)
Blue-footed booby during a courtship display in the Galápagos Islands, Ecuador (© Scott Davis/Tandem Stock)(Bing United States)
Sugar Loaf Mountain and Guanabara Bay, Rio de Janeiro, Brazil (© Bronek Kaminski/Getty Images)(Bing United States)
Cigu Lagoon at Tainan, Taiwan (© Sunrise@dawn Photography/Getty Images)(Bing United States)
United States flag, New York Stock Exchange, New York City (© Hisham Ibrahim/Getty Images)(Bing United States)
African lion cub playing with adult male, Masai Mara National Reserve, Kenya (© Suzi Eszterhas/Minden Pictures)(Bing United States)
Toledo, Spain (© Pedro Jarque Krebs/500px)(Bing United States)
Detail of a porcelain mushroom in the Veluwe, Netherlands (© Jan Vermeer/Minden Pictures)(Bing United States)
Nam Tok Thi Lo Su in Umphang Wildlife Sanctuary, Thailand (© Apisit Sriputtirut/Alamy)(Bing United States)
A frog clings to the tip of a branch, Adelaide, Australia (© Rob Sturman/Corbis)(Bing United States)
The Bodleian Library, Oxford, England (© Charlie Harding/Corbis)(Bing United States)
Solar flare (© NASA)(Bing United States)
Cows in Thurgau, Switzerland (© plainpicture/Yabo)(Bing United States)
Canada geese in Hills Lake, Pulaski County, Arkansas (© Barry Hamilton/Corbis)(Bing United States)
Pasture in Mânăstirea Humorului, Bukovina, Romania (© Photononstop/SuperStock)(Bing United States)
Guggenheim Museum Bilbao, Bilbao, Spain (© Juan Carlos Sancho Folgueiras/500px)(Bing United States)
Fish swimming near the Aquarius Reef Base in the Florida Keys National Marine Sanctuary (© Stephen Frink/Corbis)(Bing United States)
Pier at Old Orchard Beach, Maine (© Michael Orso/Tandem Stock)(Bing United States)
Accumulation of rainwater in the Sahara Desert, east of the Aïr Mountains, Niger (© Michael Fay/Aurora Photos)(Bing United States)
The Sunnmøre Alps over Hjørundfjorden, Norway (© AirPano)(Bing United States)
