My daughter works as a Zipline safety guide at The Gorge in Saluda, NC. The longest, steepest zipline course in the USA. My wife and I went with her group on the course, and it takes about 4 hours to go down 11 different ziplines. At one point, we were 350 feet above the ground over a ravine!. Spectacuar waterfalls, and scenery in the Blue Ridge Mountains.