Real window in Nuketown
1111111 Go in front of any house in Nuketown and go to your right. Before getting in the backyard, stop at the corner of the house and face what looks like a flower box. It should say Press A to get on top. Afterward, climb up the wooden lattice that looks kinda like a ladder and you should be in front of one of the windows on the top floor. If the window is already broken, you can climb inside.