Great Smoky Mountains National Park sits astride the Tennessee–North Carolina border amid the majestic southern climax of the Appalachian Highlands, near Knoxville. The most visited of U.S national parks draws more than 9 million adventurers and sightseers each year. And for good reason — the Smokies are within a day's drive of a third of the U.S. population, and very few places in the East are in their league as an outdoor-recreation destination.