human
Make a concise location description of a foreboding scene inside a tunnel sewer with pipe, cap, planks, and bolts.
assistant
Built into what looks like a former sewer, the narrow hallway has curved metal walls and is dimly lit by torches mounted in makeshift stands on either side. Dry wooden planks cover the floor and provide a sturdy footing, secured firmly in place by large metal bolts. The hallway dead-ends at a solid piece of flat metal, likely a cap to the large metal pipe that makes up the walls.