A week ago, Alex Eylar (AKA Profound Whatever) posted his MOC of M.C. Escher's 'Relativity', albeit with LEGO Spacemen. The model made the rounds of several blogs, but largely featured the set design and not the figures. Alex has done it again; however, I feel the figs are more central to this piece.
When I first saw this creation I had a hard time distinguishing the real and 'brick-built' elements. The book from which the Spacemen emerge blends well into scenery. This is based, of course, on Escher's 'Lizards' which you can reference below.