Living in Australia, we don’t exactly have much in the way of ruins. But there are the industrial ruins, like the following ones of the Old Coogee Powerstation in Western Australia.
Of course, there is plenty of graffiti in a place like this, as you have already seen.
And here are some older photos from the old carriage works next to Newtown Train Station. A veritable forest was growing inside, though I think that now they are doing the place up. I was a bit nervous walking around inside, with all the broken windows on the ground and the intact ones rattling in the wind above me.