大烟山国家公园中的咆哮溪，田纳西州 Roaring Fork in Great Smoky Mountains National Park, Tennessee (© Paul Hassell/Tandem Stills + Motion)

大烟山国家公园中的咆哮溪，田纳西州 Roaring Fork in Great Smoky Mountains National Park, Tennessee (© Paul Hassell/Tandem Stills + Motion)

Loud waters

Roaring Fork may seem like a misnomer for this mountain stream in Great Smoky Mountains National Park. During dry spells, it's an idyllic mountain stream. But Roaring Fork descends 2,500 feet over just two miles—a steep drop down Mount Le Conte. When heavy rains swell the stream, Roaring Fork transforms into a whitewater rush, with the sound of the surging water echoing off the sandstone walls of the mountain.