Hello how may I help you? Do you know where the tallest indoor waterfall is located at The world's tallest indoor waterfall is located in Singapore in The Heart of Singapore. Okay great do you know where the world's tallest waterfall is located regardless of indoor or outdoor The world's tallest waterfall is located in Venezuela. Okay great thank you for information Is there anything else I can help you with? No that's all Have a great day! Thanks you too No problem! Thank you!