Interestingly, Lambert found the waterfall by accident when he dug into the mountain looking for a suitable place for an elevator shaft. He was forced to look for an alternative entrance because the original entrance was sealed due to railroad construction nearby.
Ruby Falls is not only an environmental historical landmark, but it is also devoted to keeping the environment clean by using renewable energy. There is an array of solar panels built for Ruby Falls that produces 16,000 watts of electricity for all of the appliances used. There has also been an effort to reduce the greenhouse gas emissions by changing the types of light bulbs that are used, as well as changing the timing and duration of lighting.