Hello how may I help you? Hello, I can a question about a world record. What would you like to know? Where is the tallest indoor waterfall located? The worlds tallest indoor waterfall is located in Gardens by the Bay, located in Singapore. Where is the tallest waterfall indoor or outdoor located? The tallest waterfall in the world is Angel Falls, located in Canaima National Park, Venezuela. It is outdoors. Okay. Thank you! No problem, do you have any more questions? No, that was it. Thanks again! Great, have a great day!