Ruby Falls

"The mysterious wonder of an underground waterfall is illuminated by multicolored lights. " Full review

"Located along the Tennessee River Gorge just south of downtown Chattanooga, Ruby Falls is one of Lookout Mountain's most popular attractions — and it was discovered completely by accident." Full review

"More than 80 years ago, Leo Lambert and a small crew spent 17 hours inside this cavern before discovering what is now the world's tallest and deepest underground waterfall (145 feet) open..." Full review