Vaucluse is bordered by the Rhône to the west and the Durance to the south. Mountains occupy a significant proportion of the eastern half of the department, with Mont Ventoux (1,912 m), also known as the Giant of Provence, dominating the landscape. Other important mountain ranges include the Dentelles de Montmirail, the Monts de Vaucluse and the Luberon. Fruit and vegetables are cultivated in great quantities in the lower-lying parts of the department, on one of the most fertile plains in Southern France. The Vaucluse department has a rather large exclave within the Drôme department, the canton of Valréas (Enclave des Papes).