Ruby Falls is the nation's tallest and deepest underground waterfall open to the public. The breathtaking falls were accidentally discovered by Leo Lambert in 1928 deep within Lookout Mountain in Chattanooga, Tennessee. Lambert named the falls after his wife, Ruby, and opened the Chattanooga attraction to the public in 1929. Today, Ruby Falls welcomes over half a million visitors each year from around the world. Descend 260 feet by elevator into historic Lookout Mountain to explore the underground cavern, see the falls and discover why this unique destination has been named one of the best things to do in Tennessee for over 90 years. Adventure awaits at Ruby Falls!