Hello how may I help you? need to know some info about waterfall records ok, please go on where is the tallest indoor waterfall located? what do you mean by 'indoor waterfall'? a waterfall that is inside in an interior and not outdoors according to my sources, the tallest indoor waterfall in the world right now is located in las vegas where is the tallest waterfall? in the casino called wonderfall thank you for this info bot that is all i need you are welcome