3 ms·Assuming the sewers are even navigable for a human.by waterlesscloud 13y agoAssuming the sewers are even navigable for a human.Someone 13y agoI know little about sewer systems, but if there is a manhole cover, isn't that likely?aaronem 13y agoIt could lead into a navigable system of tunnels, or it could just open onto a pit full of pumping machinery.