Theatre of the Shadow at the Sovanna Phum Theatre, Phnom Penh, Cambodia -- SIME/eStock Photo © (Bing United States)
Merowe necropolis, Sudan -- Pepeira Tom/Photolibrary © (Bing United States)
Blyde River Canyon, South Africa -- Heeb Photos/eStock Photo © (Bing United States)
New old bridge over river Neretva, Bosnia and Herzegovina -- Luke Agbaimoni/Getty Images © (Bing United States)
Observation deck overlooking the limestone karst of the Stone Forest in Kunming, China -- Kelly-Mooney Photography/Corbis © (Bing United States)
Common indoor/allergenic mold -- Dennis Kunkel microscopy, Inc./Visuals Unlimited © (Bing United States)
A worker returns to earth after lubricating the top of a drilling rig -- Joel Sartore/Getty Images © (Bing United States)
Fakarava Atoll in the Tuamotu Archipelago -- Sergio Pitamitz/Corbis © (Bing United States)
All-Alaskan Racing Pigs leap over the fence along the pig race track at the Alameda County Fair -- Norbert von der Groeben/The Image Works © (Bing United States)
Carolina Panthers v Minnesota Vikings in 2008 - Tom Dahlin/Getty Images © (Bing United States)
One of the two ‘Tribute in Light’ columns at Ground Zero, New York City -- Seth Cohen/Corbis © (Bing United States)
Havasu Creek and Havasu Falls, Arizona -- David Svilar/Delimont, Herbig & Associates © (Bing United States)
Women carrying pots, Rajasthan, India -- Eric Meola/Getty Images © (Bing United States)
Angkor Wat, Cambodia -- Bruno Morandi/Photolibrary © (Bing United States)
The Wave, a sandstone formation in the Coyote Buttes of the Vermilion Cliffs Wilderness Area, near the Arizona-Utah border -- Joseph Sohm/Corbis © (Bing United States)
European Bee Eaters in Kiskunsag National Park, Hungary -- ARCO/age fotostock © (Bing United States)
Illuminated bridge in the Karamay River Scenic Area in Karamay, Xinjiang Uygur Autonomous Region, China -- Zhou Jianling/Corbis © (Bing United States)
Dutch replica of the 1649 ´Prins Willem´ sailing ship -- Bjorn Svensson/age fotostock © (Bing United States)
Auditorium and seating cards at the 60th Primetime Emmy Awards in 2008 -- Mathew Imaging/Getty Images © (Bing United States)
Black-headed seagulls populate an elaborately carved sand sculpture on a beach at Ocean City, Maryland -- Kevin Fleming/Corbis © (Bing United States)
Garden at Changdeokgung Palace, Korea, a World heritage site -- Yoshio Tomii Photo Studio/Photolibrary © (Bing United States)
Neptune Glows a Brilliant Blue in the Night Sky Seen by Voyager 2 -- NASA-JPL-Caltech - digital versi/Corbis © (Bing United States)
Tour of Suisse cycling race passing through St. Gotthard Pass, Switzerland -- Tim De Waele/Corbis © (Bing United States)
Manhattan and Central Park, New York -- David Jay Zimmerman/Corbis Edge/Corbis © (Bing United States)
Oyster farm on Lemmens Inlet in Clayoquot Sound, Vancouver Island, British Columbia, Canada -- Chris Cheadle/All Canada Photos/age fotostock © (Bing United States)
Swarovski Kristallwelten Museum, Wattens, Austria -- Riccardo Spila/Grand/Corbis © (Bing United States)
Galapagos scalloped Hammerhead sharks -- Perrine Doug/Pacific Stock/Photolibrary © (Bing United States)
Chilli peppers drying in the sun on the rice terraces of LongJi in Guangxi, China -- age fotostock/Superstock © (Bing United States)
Oktoberfest in Munich, Germany -- Peter Widmann/Photolibrary © (Bing United States)