Welcome!
I too am in Geelong most of the time. I've done a fair share of exploring in Melbourne though and am there every second weekend or so. You only do abandonments or are you interested in drains as well? Interested in meeting up perhaps? I'm sure I could show you some things. There are so many wonderful things in Melbourne I wouldn't even know where to tell you to start.
Cheers, Echo.
Wander often. Wonder always.