>It should also mention that the car park fills up really quickly

... and gets very slippery in wet weather. Talking of clearance cairns what is the thinking on these ones in Fitz's photo -
http://www.themodernantiquarian.com/post/33529/images/gardoms_edge.html

On the ground they didn't look all that old to me but looking at the photo I think I've changed my mind. Are they Bronze Age?

-Chris