EntityQ7376312· pop 5· linked from 95 articlesRuby FallsSign in to saveunderground waterfall within Lookout Mountain, TennesseeConnectionsspeleothemEntityUnited StatesCountryrainEntityTennesseeEntitymagnesiumEntitygeographic coordinate systemEntityInternational Standard Book NumberEntitywaterfallEntityWayback MachineEntityJohnny CashEntityelevatorEntitylimestoneEntityPaleozoicEntityCarboniferousEntityChattanoogaEntitychemistEntityTennessee RiverEntityweatheringEntitystalactiteEntityRoy OrbisonEntityCategoriesCaves of TennesseeHistoric districts on the National Register of Historic Places in TennesseeLandforms of Hamilton County, TennesseeLimestone cavesLookout MountainNational Register of Historic Places in Hamilton County, TennesseeNRHP infobox with nocatProtected areas of Hamilton County, TennesseeShow caves in the United StatesSubterranean waterfallsWaterfalls of Tennessee