My belief with regards to that image is that the people in charge of making the backgrounds and placing them did not place this in the correct location.
It 'probably' was supposed to be a background for the ClockTower stage, since it actually is on the opposite side of the castle, in a location where that view would be reasonable...
...problem is, once the clocktower stage was designed, it ended up coming out of a cavern and possessed no windows until the boss fight.
So it seems like, rather than waste a beautiful background, they decided to go all roflcopter and place it 'somewhere' so that it doesn't go to waste.