World War II monument, Sutjeska National Park, Bosnia and Herzegovina (© Brendan van Son/Tandem Stills & Motion)(Bing United States)
Hanoi, Vietnam (© David Santiago Garcia/Aurora Photo)(Bing United States)
Visitors in Death Valley National Park, California (© David Hellard/Rex Features)(Bing United States)
Rocky Mountain National Park, Colorado (© Dan Ballard/Corbis)(Bing United States)
Leopard perched in a tree in the Moremi Game Reserve, Botswana (© Getty Images)(Bing United States)
Meltwater creates waterfalls on an ice cap, Svalbard Archipelago, Norway (© Ralph Lee Hopkins/Corbis)(Bing United States)
Valais Blacknose sheep in Valais, Switzerland (© NaturePL/SuperStock)(Bing United States)
Millau Viaduct over the Tarn River Valley near Millau, France (© Patrick Landmann/Science Photo Library)(Bing United States)
Rio Tinto, Huelva, Spain (© David Santiago Garcia/Aurora Photos)(Bing United States)
Canoe on Moraine Lake in Banff National Park, Alberta, Canada (© Getty Images)(Bing United States)
The National September 11 Memorial & Museum, New York City (© Andrew Holbrooke/Corbis)(Bing United States)
Mesa Arch, Canyonlands National Park, Utah (© Jeff Clay/Tandem Still + Motion)(Bing United States)
Fort McHenry National Monument and Historic Shrine, Baltimore, Maryland (© Richard T. Nowitz/Corbis)(Bing United States)
Mammoth Hot Springs, Yellowstone National Park, Wyoming (© Dmitrii Lezine)(Bing United States)
Maya pyramids, Tikal, Guatemala (© AirPano)(Bing United States)
Alpine foothills surrounding the town of Weiz in Styria, Austria (© Andreas Neuburger/Getty Images)(Bing United States)
A dredge boat near the Glénan Islands, France (© Andia/Latitude Stock)(Bing United States)
Young guanaco seeking safety under its mother, Torres del Paine National Park, Chile (© Gavriel Jecan/Aurora Photos)(Bing United States)
Macaws, Tambopata National Reserve, Peru (© Frans Lanting/Getty Images)(Bing United States)
Ferris wheel gondolas, Oktoberfest, Munich, Germany (© Karlheinz Irlmeier/Corbis)(Bing United States)
Peace Camp at Downhill Beach in Northern Ireland (© Christopher Hill Photographic/Alamy)(Bing United States)
Orcas in Resurrection Bay near Kenai Fjords National Park, Alaska (© Steven Kazlowski/SuperStock)(Bing United States)
Abandoned army trucks on the North Canol Road, Yukon, Canada (© Robert Postma/Corbis)(Bing United States)
Banana slug in Prairie Creek Redwoods State Park, California (© Michael Nichols/Getty Images)(Bing United States)
Buttermere, Lake District National Park, England (© Chris Warren/SuperStock)(Bing United States)
Elephants in the Okavango Delta, Botswana (© Michael Poliza/Getty Images)(Bing United States)
Alaska Peninsula National Wildlife Refuge (© Steven Besserman/Corbis)(Bing United States)
Boathouses on Lake Panache, Greater Sudbury, Ontario, Canada (© Don Johnston/Corbis)(Bing United States)
Hohenzollern Castle near Stuttgart, Germany (© Heinz Wohner/Getty Images)(Bing United States)
Sheep with a border collie in England (© Wayne Hutchinson/Minden Pictures)(Bing United States)
