obviously apart from my bargain £7 boots i bought this afternoon...
http://www.andrewlipson.com/escher/relativity.html
ooh and this one... http://www.andrewlipson.com/escher/ascending.html
Some may have seen this before, but it really brightened up my friday!
I just wish i had this kind of eclectic imagination... but then my mind works in mysterious ways anyway.
enjoy!