A very old wooden building built by twolegs. It only has three walls, but the side of the house without the wall goes over a cliff. Many many years before, a very large group of rats lived there and drove out SkyClan. When the new SkyClan was brought up however, the rats were killed and haven't been a problem since. Still, just to be cautious, SkyClan cats patrol the building cautiously just to make sure the rats aren't trying to force them out again, and then of course, they make good prey.