The sewers beneath the City are dark and ancient. The tunnels are tall enough for a person to walk through, with wide stone paths on either side of the flowing muck. The walls are solid stone, grown over with moss and the occasional slime mold, and they don't seem to have been hewn by any human hand. Who knows what may lurk in these dank and filthy corridors?
The sewers contain many secrets and may access secret areas of the city.