human
Produce a detailed written description of a chilling scene outside town with an iron-rung ladder and a wall.
assistant
A thick granite wall stretches across the mouth of the harbor, broken by a gap between two towers to allow ships passage within the town. Two stories tall, the wall is wide enough for two guards to walk abreast on their rounds. Ships of outsiders remain moored on the river side of the wall, their crews allowed to visit only on foot. An iron-rung ladder fastened to the harbor side of the walkway leads down to the water.