BaincthunBaincthun is a commune in the Pas-de-Calais department in the Hauts-de-France region of France.WWW baincthun.frGeographyA farming and quarrying commune, some southeast of Boulogne-sur-Mer, at the junction of the D341 and the D234 roads.Sights A feudal motte. The church of St. Martin. The Château d'Ordre, dating from 1672 at the hamlet of Maquinghen. The manor at Lannoy.