Whether it is views, history, caverns, or relaxation you are looking for, Ruby Falls is the perfect solution. Conveniently located on historic Lookout Mountain, and minutes from scenic downtown Chattanooga, Ruby Falls offers visitors a fun filled family adventure. Ruby Falls is an underground waterfall located deep inside the mountain. The fascinating story of the formation of Lookout Mountain and Ruby Falls is told by the rocks themselves. Ruby Falls is America's highest and most visited underground waterfall.