When I went hunting for Knocks North stone circle I was told it was 'ruined', so when I could not find an easy route to it I didn't go out of my way and I've never bothered going back to see it. From the road 150m away I could see the tops of two stones over a hedge and that was it.

I'll have to go back now, though. It's a cracker!

http://www.themodernantiquaria[...]nocks_north.html?stream=latest

Thanks Gordon!