http://i297.photobucket.com/albums/mm201/aussiedicky/House044small.jpg
The hole in the side of the bath surround will be covered with a grille. It's so the spa pump can be replaced. I was pretty impressed that the builders brick in the bath. Apparently it's so the tiles will never crack. Apparently that can be the case if they were to use a wooden frame.
Any pics of your completed main bathroom?