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. The northern part of the department, the
Canton of Valréas, forms an enclave within the department
Drôme. 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). Vaucluse is also known for its
karst, including the
karst spring Fontaine de Vaucluse after which "Vauclusian Risings" are named. is the source of the
Sorgue. It is characterised by an upward movement of water from the depth of over .
Principal towns The most populous commune is
Avignon, the prefecture. As of 2023, there are eight communes with more than 15,000 inhabitants: == Demographics ==