Add to that the fact that this area is dense with Neolithic remains: this is just one more to add to the list. And in Ireland there is no tradition of circular irrigation structures, let alone interrupted circles! It could, of course, be a unique and bizarre folly from a more recent period. But given the location and the fact that henges are a known phenomenon, that can really be ruled out.

https://en.wikipedia.org/wiki/Brú_na_Bóinne