The Lookout Mountain Incline Railway in Chattanooga, Tennessee, is world-famous for being one of the steepest passenger railways in existence, featuring a breathtaking maximum grade of 72.7%. Known as "America's Most Amazing Mile," the track climbs nearly straight up the side of the mountain, providing a high-fidelity thrill that feels more like a vertical ascent than a traditional train ride. The trolley-style cars are specially engineered with tiered seating so that passengers remain level even as the car tilts to extreme angles. This "High-Fidelity" engineering marvel, which has been in operation since 1895, is a National Historic Site and a National Historic Mechanical Engineering Landmark. As you reach the top station, which sits at an elevation of 2,100 feet, you are treated to a panoramic, high-fidelity view of the Tennessee Valley and the Great Smoky Mountains. The 72.7% incline makes it a bucket-list experience for rail enthusiasts and thrill-seekers visiting the American South in 2026.