Just got back from Barcelona, where there was loads of really good graffiti. Thought I'd start this thread so that when people see especially artistic or amusing graffiti, they can take a quick picture and post it here to share the wealth.
My two favourites from this weekend are attached below, one of them just being quite nice artwork, and the other just being completely random.
Incidentally, the funniest graffiti I ever saw was daubed in green paint in 2 foot letters on the front of Birkenhead Library a couple of years ago:
NAT CARSON HAS MONGY KIDS.
Genius.