Just a couple of tiles I thought made for a good sewer. Please note, sewers are filled with toxic gasses of all kinds. Use faerie fire only with torches. Unless exploding players is your goal. For which, these also work.
From left to right, top to bottom
Corridor for Sewer Opening
Sewer Drain to Water
Torch Clip On Wall (2inch)
Rotating Secret Sewer Wall (2 parts)
Clip On Wall (2inch)... [click here for more]