Question: Where is America’s tallest publicly accessible underground waterfall?
Hidden deep within Lookout Mountain in Tennessee’s Cumberland Plateau is Ruby Falls — America’s largest and deepest publicly accessible waterfall. The 145-foot-tall falls are located more than 1,100 feet below the mountain’s surface. Tours operate daily via a glass elevator that descends 260 foot into the cavern, with colored lights illuminating the falls.
The Answer: The correct answer is Hawaii.