At Zip Gatlinburg Tree Trek Adventures, riders as young as 5 can go flying through the treetops. During the 1.5-hour guided tour, guests glide down nine long ziplines. And if for some reason they miss the view of the National Park or the squirrels performing a flash mob down below, the GoPro camera attached to their helmets might catch it. Alternately, visitors can take on the ropes course, traversing bridges as high as the trees, scampering up ladders, and sailing across trapezes. For a slightly tamer attraction, climb onto the trapeze net, which hangs 30 feet off the ground.