The hole in the roof begins as a circular opening as wide as you are tall, but quickly tapers into a much smaller tunnel that ascends into the rock. Although you cannot see anything up there, a soft, cool breeze falls upon your face. It's possible that the hole was once a chimney or some other conduit to the outdoors.
You turn your attention to the floor, where a large circle has been painted in the same faded, ruddy color as the pictures that cover the walls. It is situated directly underneath the hole in the roof, and you find yourself drawn to it by a force still only on the verge of your understanding.
Enter the Circle