Stalactite Organ
Weird, Freaky, and True
There are plenty of unusual instruments out there--the alphorn, the didgeridoo, the theremin--but very few come close to this musical oddity.
Located in Luray Caverns in Virginia, the Great Stalacpipe Organ is the world's largest natural instrument, measuring three and a half acres long. Pentagon scientist Leland W. Sprinkle created the Stalacpipe Organ after noticing that stalactites produced notes after being struck. Sprinkle spent three years tuning the stalactites with sandpaper to achieve various pitches and then wired rubber mallets to strike the stalactites when the corresponding key is pressed on the organ's keyboard.
