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Yellowstone National ParkA juvenille lion peers from behind trees
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Yellowstone National Park
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An aerial view of Yellowstone Lake
An aerial view of Yellowstone Lake
 
Upper Geyser Basin Hydrothermal Features on a Winter Day.  

Did You Know?
Yellowstone contains approximately one-half of the world’s hydrothermal features. There are over 10,000 hydrothermal features, including over 300 geysers, in the park.

Last Updated: September 01, 2009 at 15:27 EST