Alan Titchmarsh reveals the secrets of the Cistercian monks who lived at Fountain's Abbey in North Yorkshire over 800 years ago, and visits its neighbour - the spectacular Studley Royal Water Garden. Anneka Rice is at Mottisfont in Hampshire and Britain's last working water-driven spade mill. Miriam O'Reilly joins a bat watch on the South Downs, and Dan Jones treads in the footprints of Giants in County Antrim.