Dutch artist M.C. Escher was famous for his drawings of structures that appeared normal at first glance, but which then seemed impossible once you studied the image more closely.
While most of Escher's creations look like they could never exist in three dimensions, Lego artists Andrew Lipson and Daniel Shiu have proven this thinking wrong by building amazing Lego recreations of some of his most famous works.
What's really impressive here is how the optical illusions still work, even though you can now move around the scene to view it from different angles. Check out how the water feeding the waterfall manages to get from the bottom to the top while appearing to stay flat and level, it's amazing!