The Great Smoky Mountains National Park is America's most visited national park and the centerpiece of Sevier County, Tennessee. This vast natural wonderland is famed for its diversity of plant and animal life, the beauty of its ancient mountains, and the remnants of Southern Appalachian mountain culture. Popular activities include hiking the park's 800+ miles of trails, viewing historic homesteads, and observing wildlife. The park's mist-covered mountains offer stunning vistas all year round, particularly in the fall when the foliage turns to vibrant shades of red, yellow, and orange.