Human: Compose a short description of a spooky scene inside a sewer with a tunnel, aqueduct, light green glow, and water. Assistant: 
A layer of water only a foot deep covers the floor of what once was an aqueduct for the city above. A tunnel runs off in six directions from this point to carry the water to the thirsty residents. A hole leads upward, and a small amount of light filters down from the hole. The main illumination, however, is provided by a light green glow from the water underneath. The air is still and cool, and sounds echo easily off the cramped walls.