In v19 I built this really stuffty hangar type thing with walls made of 1x1x5s stacked two tall and was filled with 1x1s that had weapons on them and it had a hallway that led to a longer building of the same structure that had an open end for the plane to get out. Next to it was another building (I think I had caught onto using bigger bricks by then) that had a bunch of vehicles in it and a poorly evented door in the back. Another build I remeber is a transparent dock at the first lake in slopes.