the caverns of virginia and this instrument is there because of a man with an incredible name, leyland sprinkle. who in the 1950s went spelunking in the cab friends and decided they would make the perfect backdrop for what you become the world's largest musical instrument. what you see here is the council but what you don't see are the pipes of this church organ, the pipes -- what he did was spend years searching these caves for stalactites that would make the exact right sound when he struck them. so once he had found them he wired 5 miles worth of cables from the central council to each individual stalactite. it is called this delay take pipe organ. he he used to play the organ, it is now played an automated way, but cds with music from the organ are still on sale at the gift shop in the caverns. as they have have been marketed as musical gems from solid rock. this wonderful device which resembles a tiny carousel is actually an attempt to add a weather prediction device. let's first exhibited at the 1851 london exhibition. it was created by a man with another great name, a name perfect for me