Ruby Falls is 145-foot underground waterfall located in Lookout Mountain. It is America's deepest commercial cave and largest underground waterfall. The Falls are located at the end of the main passage of Ruby Falls Cave, in a large vertical shaft. The stream, 1120 feet underground, is fed both by rainwater and natural springs. Visit Ruby Falls and descend 260 feet into historic Lookout Mountain by elevator.
In 1928, Leo Lambert and a team of excavators found a breathtaking waterfall located over 1,120 feet below the surface of Lookout Mountain in Chattanooga, TN. Ruby Falls was named after his wife. Ruby Falls is the tallest and deepest underground waterfall open to the public.