Flickr User Jakedobkin has uploaded a collection of images taken in the Freedom Tunnel [wiki].
Among the dozens of photos is this one that attracted me, because I'm against graffitis but never ever thought that one of those supposed artists could have known about the Francisco de Goya [wiki] picture, painted after the rebellion of Madrid against the French invadors in 1812, on the shooting of some patriotic civilians. The picture is called The Third of May 1808 [wiki].
The Third of May 1808 picture is part of a series on the Independence War, and follows The Second of May 1808 [wiki] in which you can see the rebellion against France.
Please ignore the stupid bastard who made the additional yellow graffiti painting on it :(
Link [Flickr]
not to mention thats its a starting place for some of the best graphic designers around.
check out the documentary Rock Fresh.
P.S Banksy's kind of sold out, he sold this http://img79.imageshack.us/img79/8816/angelinajolie074ltr2.jpg to Angelina Jolie for $75,000, unless he comes out in a few months and says he gave the money to charity and it was all "art" he's pretty hypocritical.