There’s some very beautiful photography of the stone circle in the Millstreet Country Park by Ken Williams at this site , where he has this to say:
Every once in a while you come across a place that puts your head in a spin and in all the confusion you just want to laugh. This is a very odd place. Very, very odd. After seeing a handful of pics in a picture library of a stone circle with some unusual looking arrangements around it, there was nothing else to be done only track this strange place down and see it for myself …
You can read the rest of his article here: http://cianmcliam.smugmug.com/gallery/1537658
