Ooooh there is so much. Used to go underground a lot.. Near my place there were a load of tunnels that we could get into, people would go down there to drink, smoke, etc.. We used to wander around the canals and train lines.
I used to tell my mum I was at a mates place, her parents didn't speak much English so she never rang.. I could be anywhere when I said I was with her. I used to go into the city a lot when I was around 15, we'd lay on the seats on Pymont Bridge for hours, meet awesome people, then catch the Night Ride bus home..
I could write for days!