The hole in the door reveals the details on the metal bar and hinges.
This is the window on the left side of the tower.
This is the door in full view.
This window was destroyed by the Howlibird. Here it's closed.
This window was destroyed by the Howlibird. Here it's open and you can see three Smurfs.
These stairs are inside from the uncovered window, side left. They spiral downwards to the left.
Th tower has much better composition at night in this episode.