Hello how may I help you? Can you tell me where the tallest indoor waterfall can be found? The tallest indoor waterfall is located in Tokyo, Japan. Do you know what type of structure it can be found in? It is located in a museum. Oh. Interesting. Where is the tallest waterfall overall located? The tallest waterfall in the world is in Venezuela. Is it on a mountain, a park, or where? It falls over a cliff in a mountainous area. That answers my questions today. Thank you! You're welcome!