So, CG, what do ya'll know about draining? And no, not the removal of water from an environs, I'm talking about the act of exploring urban storm drainage systems. Far be it for me to suggest that I leave my basement once in a while, but it's sort of become my new hobbie.My friends and I recently discovered an unlocked exit tunnel dumping into our city's resovoir, and it's so cool seeing what's down there. We're trying to map it out, but it's so damned extensive.What're your thoughts/experiences?