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Smoky Sunset
Fog lingers among the forested hills of Great Smoky Mountains National Park, which spans the southern Appalachians along the border between Tennessee and North Carolina. Water and hydrocarbons exuded by trees produce the filmy "smoke" that gives the mountains their name.
Photograph by Kip Evans, Alamy

Pictures: Great Smoky Mountains National Park

Straddling the North Carolina-Tennessee border, Great Smoky Mountains National Park attracts more than ten million visitors a year—more than any other U.S. national park.

June 7, 2010
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