This is the air vent in the elevator between platforms 1/2 and 4 at Sydney’s Town Hall station. Do you like that layer of black crap?
Town Hall station is already hot, humid, smelly and dangerously over-crowded. Add to these risks the fact that you’re breathing whatever it is that’s accumulating up there.
While taking this photo with my trusty but battered Nokia N80 the other day, I expected someone to question me — concerned that I was a terrorist or something. I reckon terrorists are the least of your worries here.