World's Largest Labyrinth Game Is Played with a Bowling Ball...
(Video Link) Have you ever played one of those labyrinth games where you're trying to move a marble around a wooden maze by altering its pitch? This is a giant version which is played with a bowling ball and control...
http://www.neatorama.com/2011/05/11/worlds-largest-labyrinth-game-is-played-with-a-bowling-ball/



