How That Impossible Escher Waterfall May Have Been Built [Video]
Source: http://gizmodo.com/#!5764700/how-that-impossible-escher-waterfall-may-have-been-built
Remember this? Still pretty crazy! But maybe a little less so after taking a look at David Goldman's theory of how exactly this contraption was put together:
It's amazing what a little forced perspective and careful editing can do. Remember, though, that this is pure speculation. There's still a distinct possibility that the real answer is magic. [BoingBoing]