The luray caverns organ is not the worlds largest musical instrument, its far from it. The worlds largest musical instrument is the Atlantic City Convention Hall organ, it has over 33,000 pipes, over 1,200 stops and 7 keyboards. It is 10 time the size of the average church organ and it is configured in a surround sound design with pipes spread over the huge room which measures 500ft wide and 300ft wide and 137ft tall. Its website is www.acchos.org