Wine Table. The onyx table stands six feet high and is supported on three natural legs. Known as an aragonite formation, this structure was composed almost entirely underwater. The Wine Room and the Wine Table are adorned with grape-like clusters called botryoids. Originally called the Wine Room because of these grape clusters, the cave now claims that it is called that because of the "whining" that visitors do when they learn that the room is accessible only after climbing numerous stairs (a total of 58 steps). "Greatest Show Under the Earth" The Cavern also contains a massive sheet wall of formations formed during the past several thousand years, which the cave calls its "stage curtain" and which is also used for displaying the light and sound show called "Greatest Show Under the Earth". "Hollywood" A room within the cavern was used for Hollywood productions, most notably Tom Sawyer (1973). In the particular movie, the site was used as the cave system where Tom Sawyer (Johnny Whitaker) and Becky Thatcher (Jodie Foster) got lost in a cave, as well as Tom Sawyer and Huckleberry Finn (Jeff East) find the hidden gold. An episode of Lassie was also filmed in this part of the cave. Mirror Room The Mirror Room is a room within the cavern that contains a stream of water about deep. However, when a group of lights are turned on, the depth of the water is perceived by many to be as great as , due to the reflection of the cavern's roof on the undisturbed water. Ballroom First used in 1890, The Ballroom is a room in the cavern system that was used in earlier times as a room for square dances and other community events. It is now one of the first stops on the tour and is used for a few annual concerts by the Lester Family. References External links Meramec Caverns official website at AmericasCave.com Caves of Missouri Landforms of Franklin County, Missouri Show caves in the United States Limestone caves Roadside attractions in Missouri Tourist attractions along U.S. Route 66 Tourist attractions in Franklin County, Missouri