Monty Don continues his extraordinary journey in the Mediterranean - the cradle of European civilization.In Italy, Monty visits some of the elaborate high Renaissance gardens of stone and water which have hugely influenced western garden design. He also visits the remains of Emperor Hadrian's palatial retreat.Monty then looks at the artistic achievements of the Moorish culture. He travels to Marrakesh, where he visits The Aguedal - one of the oldest continuously maintained gardens in the world; and in Spain he visits The Alhambra, thought by many to be the most perfect garden in the world.