a green mountain is visible through the window opening

sky hill horizon mountain tower landscape landmark nature green visible window opening ancient fortress wall runs top ridge watchtowers blue india jaipur amber fort open window openings frame windows copy space defensive wall fortifications range hills slope defensive defense ridge watch tower unscalable watchtower amer fort sky mountains unapproachable top jaipur india unassailable green hill fortification mountain unesco orange amer historical traditional heritage architecture amber ancient old blue landmark fortress