If you ever get the chance to got to Austria, ( the country with no Kangaroos). You have to visit the northern suburbs along the Donau Canal, we stayed at Friedensbrucke.
The whole length of the lower walkway walls, along the canal on both sides of the canal are covered with street art.
A pretty arty video of some pretty arty people with some arty effects Piros, if ever you interstaters ever get to Melbourne check out Hosier Lane, street art at its best...