Chevy Hubcap Banjo.

Whole Wheat Radio user 65strat built this banjo from an old Chevy hubcap:

Ok, I admit that the banjo is silly. But I think its kinda cool. The ring is made of 5 plies of maple. The neck is mahogany with Bolivian rosewood on the fingerboard, head plate, and heel plate. The head is goatskin held on by about 70 upholstery tacks. Here is a sound sample.

http://www.wholewheatradio.org/wiki/index.php/User:65strat (via J-Walk Blog)