In 1928, Leo Lambert and his team were drilling an elevator shaft to open Lookout Mountain Cave to tourists when they inadvertently discovered a previously unknown cavern system. Exploring this new passage, Lambert ventured deep within the mountain until he came upon a magnificent 145-foot waterfall cascading into a pool. He named the waterfall 'Ruby Falls' after his wife, Ruby Lambert, who accompanied him on a subsequent exploration. Lambert developed Ruby Falls as a tourist attraction. Today, visitors descend by elevator into the mountain, walk through the decorated cavern, and witness the dramatically lit underground waterfall, a testament to Lambert's accidental discovery and entrepreneurial spirit.
Source: Ruby Falls, official history; Ruby Falls, official visitor and location information