She lowered her head, moving slowly across the ancient surface of faintly reddish metal. No snow, no dust, no debris of any kind. I wonder if I should be worried about that. It snowed so often on the surface that it did seem a little unusual there wasn’t thicker ice above them, or that the opening hadn’t filled in over the eons. Someone must use this often enough to keep it clear. Please don’t clean it while we’re down here. It would be just their luck for an eruption of fire (or whatever else the ring used this for) to come blasting out of the depths as they flew down.