Hello how may I help you? Where is the tallest indoor waterfall at The tallest indoor waterfall is actually located in Singapore. how big is it It is 50 meters tall. what about the tallest waterfall in the world The tallest waterfall in the world is Angel Falls in Venezuela. how tall is that one? It is 979 meters, or 3,212 feet. wow. That's tall. Thanks I can finish my paper now You're welcome. Good luck on your paper. Thanks