Photo of the Day
Dark storm clouds over a green field
August 21, 2010
Storm Clouds, South Dakota
This Month in Photo of the Day: Photos From the 2009 International Photo Contest
"Large powerful storms can be nearly a daily occurrence during the summer months on the South Dakota plains. This one felt very mysterious as it filled the sky with dark, heavy clouds and thunder that shook the ground. It was as if two worlds were colliding."—Patrick Kelley
See more photos, see winners' galleries, download wallpaper, and solve puzzles from the 2009 International Photo Contest.
Find out how to enter the 2010 National Geographic Photo Contest »
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