A five-mile one-way tour that is referred to as a "motorized nature trail". From the main parkway (Hwy 441) in downtown Gatlinburg, turn at stoplight #8 onto Airport Road. At the intersection, continue straight on. You should stop at the historic Bud Ogle Farm to get an idea of life on a mountain farm. You'll also have the opportunity at stop #5 of the self-guided tour to hike 1.2 miles to Grotto Falls. When the water is up in the spring, Roaring Fork Creek, which parallels the road much of the way, is a sight to behold. Other features include a waterfall named "Place of a Thousand Drips". No trucks, RVs or trailers are allowed because the road is very narrow. In fact, in some places, trees encroach right to the edge of the road. The markings on the trees are clear evidence why anything larger than a car is ill advised. The motor trail makes a loop and ends in Gatlinburg. At the stop light, turn left on Hwy 321 and return to the Parkway. The road is closed in winter. Expect to spend about two hours on this tour (three if you hike to grotto Falls), depending on what features you stop to explore.