Window To Nowhere

The window over our garage is only decorative. It serves no purpose other than to decorate the area above the garage. Or does it? Maybe there is a hidden passageway in our house that leads to a secret room over the garage. Or maybe the builder left some hidden treasure in the secret room at the end of the secret passageway. Or maybe one of the construction workers left a secret message on the hidden treasure in the secret room at the end of the secret passageway.

Or...maybe there is nothing at all up there but space.