Check this 12′ x 4′ guitar for sale by its maker -

“Heavy Metal” is a large acoustic style guitar sculpture that can actually be strummed to make some musically appeasing sounds. This sculpture can be made in any size or style and can be installed in various ways, it would be perfect for a guitar lovers home, or perhaps a music store, restaurant or bar/nightclub.

“Heavy Metal”, huh? An acoustic doesn’t exactly say “Metallica” to me – maybe “Big Country“? Naming quibbles aside, it’s very cool – Heavy Metal