Cobblestones! Stones made out of that indefinable material known as cobble. The Illbillys played a coupla hours for a boist'rous gathering of building professionals at this small waterpark (previously known as Overhill Lake)...although Chris was unable to do his patented "oh, I'm not supposed to swim?" thing in the lake OR the waterpark, it proved to be a pleasant, well-attended event on a perfect afternoon.