The Great Smoky Mountains National Park is a land of superlatives. Here are the largest stands of old-growth forest in the eastern United States and the greatest mountains east of the Rockies -- 16 peaks shoulder into the sky more than 6,000 feet above sea level. But often, words pay poor homage to a park whose beauty also lies in the details of bloodroot and bluet, trillium and Turk's cap lily. A United Nations International Biosphere Reserve and World Heritage Site, the park contains about 125 species of trees, more than 200 species of birds -- even 27 different species of salamanders.