Hynšta – rock castle or something else?

Every time I visit this type of rock castle, I wonder if it really is a rock castle. Only carved rock chambers, rooms, remains of any other construction activity in the form of walls, foundations, etc. remained from this castle. they are not noticeable. So the question is, are they the fulcrums of someone and against whom? Or is it someone's hideout? And before whom? Additionally, this type of rock castle is…