The section to the north is a broken wall with rubble in the interior and old rotting fire logs on the exterior. The long area is surrounded by old dead trees, but you can see inside since the trees have no leaves. The end of the interior near the bottom of the map is open... no door.
BTW, if you click on the map, you can expand it to a full sized view. I can also create a PDF version and post that if you really want to study it more closely.
EDIT: I just realized there is something missing on the map (visible privies and a drain grate). I'm updating image image right now.
RE-EDIT: Had to resize it to be a bit smaller. EN World wouldn't show the updated map properly.