human
Please describe a gloomy scene inside a cavern with an aqueduct and rubble.
assistant
It looks as though at one time the tunnel branched off to the west. Now the tunnel in that direction is filled with rubble that spills out into the north/south aqueduct. The rubble litters the usually smooth floor of the tunnel, making the footing even more unsure than it already is in the strange lighting conditions. Overhead, a large crack perhaps two inches wide snakes out of the cave-in and across the ceiling, hinting at more instability above.