Robert Macfarlane travels Britain's ancient paths and discovers the secrets of our beautiful, underappreciated landscape.Following the tracks, holloways, drove-roads and sea paths that form part of a vast ancient network of routes criss-crossing the British Isles and beyond, Robert Macfarlane discovers a lost world - a landscape of the feet and the mind, of pilgrimage and ritual, of stories and ghosts; above all of the places and journeys which inspire and inhabit our imaginations.