They looked a bit like a group of dads pushing their noses up to a delivery room observation window: proud fathers, every one. (automobilemag.com)
No matter where you sit, your vision is always limited by the small observation windows - no viewing the action from the safety of a third person camera, here. (darkstation.com)
Vast marine environments can be seen the rough our large observation windows in our boats» hulls. (cancuntours.net)