Here is the question :
WHERE IS THE TALLEST AND DEEPEST PUBLICLY ACCESSIBLE UNDERGROUND WATERFALL IN THE U.S.?
Here is the option for the question :
And, the answer for the the question is :
[STC00841] Ruby Falls is the largest waterfall in the United States and the deepest waterfall that is open to the public. It is located on the Cumberland Plateau in the state of Tennessee. Lookout Mountain is 2,388 feet tall. The 145-foot falls are part of a watershed that includes streams, snowmelt, rainfall, and runoff from irrigation, thus the amount of water flowing over them changes greatly throughout the year. This watershed is located more than 1,100 feet below the surface of the mountain. There are daily tours that are conducted in a glass elevator that lowers 260 feet into the cavern. Colored lights illuminate the waterfalls as the elevator travels through the cavern. If you go, make sure you check out everything that’s above ground as well: At any given time, the view from the peak of Lookout Mountain encompasses all or part of the following seven states: Tennessee, Georgia, Alabama, North Carolina, South Carolina, Kentucky, and Virginia.