human
Make a concise location description of a dreary stairwell with narrow stairs, floor, puddles, archway.
assistant
A long hall separates two sets of steps, the algae-covered walls flanked by plain stone pillars. Broad stone steps gently slope upwards towards the south while to the north narrow stairs ascend steeply to an archway high above. The air is rank with a musty scent caused by stagnant puddles formed in low spots in the floor.