The hidden aspect is as likely to have been important , so often barrows , rock art , stone circles appear to be sited not on but just away from the greatest viewshed as if the it's the view from rather than to that counts .
Jeeze... the reason for that is hard to get your head around (the round barrows on the Ridgeway by the Sanctuary do that - being slightly below the summit). But I still don’t get it. In death wouldn’t the deceased want the best possible view he or she could get? I’ve heard it suggested that by positioning barrows (for example) slightly below the summit there’s somehow a stronger visual statement made but I really can’t see how that would work.