Last modified on Fri 15 Jan 2021 08.00 EST High on a Cornish moor, a living, breathing piece of artwork that is designed to last thousands of years is taking shape. Called Kerdroya, the piece is a labyrinth – billed as the largest of its kind in the world and constructed out of Cornish hedges, which are a unique combination of stone and vegetation. The footings of the hedges, the foundation boulders, or “grounders”, are in place, having been hauled out of the shallows of the nearby Colliford Lake by horse and sledge. As soon as Covid allows, hundreds of people, including schoolchildren, local people and volunteers, will help build and plant up the hedges, creating a classical labyrinth 56 metres across.