Now I know we have palisades, but those are not the best looking openings and are only in wood. I believe that an opening out of stone or metal would be a nice addition to the game like the mine doors we have with gold and steel, but they are a uniform large size like palisades and can go in the place of. This would help with making aesthetically pleasing openings especially since the new highway system requires 2 wide roads for catseyes.