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 is a series of underground cascading waterfalls totaling 145 feet in Lookout Mountain, near Chattanooga, Tennessee, in the United States.