A long time ago I was a student of a school that had some magical gardens, but some classrooms had the windows placed above the eye level, while others had wind

A long time ago I was a student of a school that had some magical gardens, but some classrooms had the windows placed above the eye level, while others had windows where you could see the gardens (and little else). The difference in the environment, feeling and atmosphere in both areas (which were otherwise identical) was like night and day.