Observatory Fabra and Barcelona seen from the hills of Tibidabo, Spain (© SIME/eStock Photo)(Bing New Zealand)

Railroad track through forest, Kagoshima Prefecture, Japan (© B.SCHMID/amanaimages/Corbis)(Bing New Zealand)

Map of Earth created by the Global Inventory Modeling and Mapping Studies (GIMMS) project at NASA’s Goddard Space Flight Center (© NASA)(Bing New Zealand)

Gorgonian coral, crinoid, and sponges, Komodo National Park, Indonesia (© Mammoth HD)(Bing New Zealand)

Kanarra Creek Falls in Utah (© Paul Didsayabutra/500px)(Bing New Zealand)

Aerial shot of Tofino with Clayoquot Sound, British Columbia, Canada (© Arnab Banerjee/Tandem Still + Motion)(Bing New Zealand)

Lightning storm off Cooke Point, Port Hedland, Australia (© Simon Phelps Photography/Getty Images)(Bing New Zealand)

Observatory on the summit of Brasstown Bald Mountain in Georgia (© Sean Pavone/Alamy)(Bing New Zealand)

Kayakers in Ashlu Creek near Squamish, British Columbia, Canada (© Phil Tifo/Tandem Stock)(Bing New Zealand)

Blue-footed booby during a courtship display in the Galápagos Islands, Ecuador (© Scott Davis/Tandem Stock)(Bing New Zealand)

Sugar Loaf Mountain and Guanabara Bay, Rio de Janeiro, Brazil (© Bronek Kaminski/Getty Images)(Bing New Zealand)

Cigu Lagoon at Tainan, Taiwan (© Sunrise@dawn Photography/Getty Images)(Bing New Zealand)

Aerial view of highway interchange, North Rhine-Westphalia, Germany (© Markus Hanke/Gallery Stock)(Bing New Zealand)

African lion cub playing with adult male, Masai Mara National Reserve, Kenya (© Suzi Eszterhas/Minden Pictures)(Bing New Zealand)

Toledo, Spain (© Pedro Jarque Krebs/500px)(Bing New Zealand)

Detail of a porcelain mushroom (Oudemansiella mucida) in the Veluwe, Netherlands (© Jan Vermeer/Minden Pictures)(Bing New Zealand)

Nam Tok Thi Lo Su in Umphang Wildlife Sanctuary, Thailand (© Apisit Sriputtirut/Alamy)(Bing New Zealand)

A frog clings to the tip of a branch, Adelaide, Australia (© Rob Sturman/Corbis)(Bing New Zealand)

The Bodleian Library, Oxford, Oxfordshire, England, United Kingdom (© Charlie Harding/Corbis)(Bing New Zealand)

Solar flare (© NASA)(Bing New Zealand)

Cows in Thurgau, Switzerland (© plainpicture/Yabo)(Bing New Zealand)

Canada geese in Hill Lake, Pulaski County, Arkansas (© Barry Hamilton/Corbis)(Bing New Zealand)

Pasture in Mânăstirea Humorului, Bukovina, Romania (© Photononstop/SuperStock)(Bing New Zealand)

The Palais des Congres in Montréal, Québec, Canada (© 2/Uyen Le/Ocean/Corbis)(Bing New Zealand)

Schooling fish hide in the shelter of the Aquarius Reef Base in the Florida Keys National Marine Sanctuary (© Stephen Frink/Corbis)(Bing New Zealand)

Pier at Old Orchard Beach, Maine (© Michael Orso/Tandem Stock)(Bing New Zealand)

Accumulation of rain water in the Sahara Desert, east of the Aïr Mountains, Niger (© Michael Fay/Aurora Photos)(Bing New Zealand)

Cathedral Quarry in Little Langdale, Lake District, Cumbria, England, UK (© David Clapp/Getty Images)(Bing New Zealand)