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.
like pat just said after he read the article,
i guess the ancients had alot more time on
their hands than once thought. they couldn't
spend as much time doing "survival" things,
like hunting, and still have time to create
so many structures out of these huge stones.