Well, I didn't know what to make of this little lot?
Reminded me of some mini First World War grass covered trenches - All over the place.
Left me totally confused. Worth a look when visiting the Hill of Tara but wouldn't be worth making a special visit for.
According to a guide at Tara, one of them still turns up yearly with a shovel and a map and asks to dig a test pit. Let's hope this happens while a crowd of Modern Antiquarians are there, so we can help him to occupy it...