The really talented dudes over at the TSF Crew have created a series of awesome new optical illusion street art pieces. Check them out, and the videos to see the making: Check out more of the TSF Crew's stuff at their website: TSF CREW OFFICIAL WEBSITE
I love it when artists play with nature in their work. In particular I have a thing for that kind of art that puts nature into a different perspective and makes you look at it in another way. A selection of artists have done exactly.