"Take the Incline Railway up Lookout Mountain on your way to Ruby Falls and Rock City and you’ll understand why the journey is often half the fun. In operation since 1895, the funicular has a maximum grade of 72.7 percent, making it the world’s steepest passenger railway and earning it the nickname “America’s Most Amazing Mile.” For its age and impressiveness, the railway is now a designated National Historic Site and a Mechanical Engineering Landmark. Before your ride, visit the machine room to see the enormous gears that drive the train, then sit back and enjoy the sweeping views of the valley below as you creep steadily up the track. Sure, you could just drive to the top of Lookout Mountain, but where’s the fun in that?"