If you didn’t notice at first glance, knights in this lego castle appear to climb infinte stairs. Is it just an optical illusion or pure magic? I would really love to hear your opinnion and comments on how this lego reproduction of Escher’s “Ascending” was built? Don’t forget to jump inside this article to see original Escher’s picture and few more cool pictures. Also visit this link for more real-life impossible structures – [via]!