Human: Write a detailed description of a serene scene inside a cave cavern with a pool, ledge, and a red towel. Assistant: 
A large cavern filled with gently bubbling water spans the space, with only a small ledge running around the rim. Granite below the water near the ledges allows for easy footing when entering or exiting the pool before it descends into darkness at the midpoint. A discarded red towel lies forgotten near the doorway to the dressing room.