human
Make a concise location description of a mystical scene inside a cave cavern with water, marble wall, and pool.
assistant
An underground river runs through this natural cavern, which has been enlarged and beautified by the stonecutters' work. The water enters near the ceiling and cascades down a rippled ramp. Reforming into a rushing stream, the water runs back and forth across the room in a series of channels cut deep into the stone until it crashes against a black marble wall, throwing up a tremendous mist. The water collects in a large pool at the base of this wall.