writes John Bett. Work is underway on a unique 56 metre path based on an historic stone carving found at the site in Tintagel Castle - that will take 4,000 years to fully complete. The meandering structure is being built by the Kerdroya Project and consists entirely of Cornish hedges. Will Coleman, who is heading the project, said the Cornish hedge was the oldest manmade structure in the world still being used for its initial purpose. He said: A hedgerow is a line of fluffy bushes, a hedge in Cornwall is something made out of stone. It s not a dry stone wall or a hedge really, it s something between the two. I wanted to do something with hedges because the Cornish hedge is unique.