A village, located 9 miles (15 km) west ofSaint-Omer, at the D225 and D208 crossroads.Seven hamlets are found within the commune: Le val d'Acquin, Lauwerdal, Nordal, Le Poovre, Westbécourt, Merzoil et and La Wattine.A largenational nature reserve has been created in the area, of great ecological interest.[4]