The Great Stalacpipe Organ is a unique musical instrument located in the Luray Caverns of Virginia. It was created in the 1950s by L. Allen Smith, who used the natural stalactites in the caverns to produce musical notes. By tapping these formations with electronic mallets, he transformed the cave into a giant organ, capable of playing a variety of tunes. This remarkable instrument is considered the largest musical instrument in the world, spanning over 3.5 acres. Visitors to the caverns can enjoy live performances, where the organ plays music that resonates through the stunning underground chambers, creating an unforgettable auditory experience.