After the discovery of the cave housing Ruby Falls the tunnelers kept digging to locate the original cave they were searching for, the Lookout Mountain caverns, which they reached 1,120 feet underground. On December 30, 1929 the Lookout Mountain caverns were open to the public, and by the following year in June the Ruby Falls cave was expanded and opened as well. By 1935 the lower of the two caves was blocked off due to Ruby Falls being the far more popular of the two caves.