The grounds of Gresgarth Hall are the masterstroke of revered landscape designer Lady Arabella Lennox-Boyd, who moved to these picturesque environs with her husband, Mark, in 1978. With a client list that ranges from Sting to Queen Paola of Belgium, Arabella has six gold medals and a Best in Show from the esteemed RHS Chelsea Flower Show, and counts Eaton Hall, the country estate of the Duke of Westminster, among her myriad accomplishments.