See the stunning images in the 4th annual International Drone Photography Contest
See where the U.S. stands in the World Bank’s 2011 list of countries with the strongest economies.
15. South Korea The city of Songdo by night. South Korea comes in at number 15 in the list of countries by gross domestic product ranking, with a GDP of $1.12 trillion in 2011. SJ. Kim/Getty Images/Flickr
The contest is accepting entries in one or all of four categories: wildlife, landscapes, underwater and aerials. The grand-prize winner will receive $10,000, publication in National Geographic Magazine and a feature on National Geographic’s Instagram account.