I placed Farlie's cage in a corner of a room and there is a window on that wall by it but not next to it. Farlie can see out at a sharp angle. Now, I found that my baby does NOT like the window at all.
Had him sitting on my finger by the window one day as we both were looking out when all of a sudden he SCREAMED and took off. Hit me in the face as he tried to get away. Another time he was playing on his cage when, again, he took off running this time right up to his 'bed' and stayed there for a while. (He can't see out when in his 'bed'.) On a couple of other occasions, he was startled and jumped severely so I just understood he doesn't like the window so I covered it.
You might try it to see if your baby will like looking out otherwise cover it. Also, keep in mind that a window will get really hot in the summer and really cold in the winter.