Hello how may I help you? Hello I have some questions about world records Sure, I'd be happy to help you with that! where is the tallest indoor waterfall? The tallest indoor waterfall is located in Trump Tower. Ok. And where is the tallest waterfall in general? The tallest waterfall is Niagra Falls. That is very helpful, thanks. Is there anything else you'd like to know? Nope thats it. thanks. Have a wonderful day!