Staro Riga 2010: Optical illusions

Optical ilusions is this year's theme of "Staro Riga", although not that many objects actually are optical illusions. Just watched "Inception" movie for the second time and I'm now in proper mood to post 2 of optical illusion installations of this year's "Staro Riga". Last day of the festival is tomorrow, I plan to go on my second tour and see some interesting objects which I didn't saw on 18th November evening.