really interesting!
You are correct. When you stand there you just know that there is alot more to it. In fact the entire area within sight is covered with graves and such. The ridges are really rich in structures as yet unexavated.
Groves of trees were also sacred spots where sacrifices were performed. The sheer terror instilled by Druidism controlled humanity for eons.
Churchill's first volume of "The History of the English Speaking peoples" goes into some detail.
Humanity hasn't given up human sacrifice either. The basic instinct for atonement-by-sacrifice is carried on today by abortionists and euthanasia of the sick and elderly.