Hidden from the road by trees and the fact that the menhir its self is covered in moss.
It's a big one!
You will need an OS map to find it, take the road that leads up towards the China Clay workings north of St Neot. When you get to the right hand turning to Northwood Farm stop and go over the gate opposit. The menhir is built into the hedge on your right.
Why is it here?
Only other sites in the area are a cairn on Mutton Down and Berry castle. There seems to be an argument as to how old Berry castle is, Iron age or earlier?
Off the usual route but I am glad I visited.