Hello how may I help you? I want to know about waterfalls and how tall they are. Indoor and outdoor ones You want to know the tallest indoor and outdoor ones is that correct? I want to know what is the tallest indoor waterfall and what is the tallest outdoor one Gardens by the bay is the world's tallest indoor waterfall Okay and where is that located? The highest outdoor waterfall is Angel Falls Gardens by the bay in Singapore Okay thanks. And where is Angel Falls? That is in Venezuela and its 979 M tall Wow. Thanks for the info You are most welcome