ⓘ Helfaut. A large village situated 4 miles 6 km south of Saint-Omer, at the D195 and D198 crossroads. It is located on a geological formation called the plateau ..

                                     

ⓘ Helfaut

A large village situated 4 miles 6 km south of Saint-Omer, at the D195 and D198 crossroads. It is located on a geological formation called the "plateau dHelfaut", which separates the Aa valley to the north from the Lys valley, to the south. The commune is home to a unique geological heritage, resulting in an unusual landscape. The sides of the old quarries alongside the plateau display many geological strata. The quarries of Heuringhem and Blendecques have collapsed as a result of soil creep. The commune gave its name to Dilluvium d’Helfaut, a flint and clay formation rare in France and Europe. The commune is home to many rare and protected species in a heathland landscape, which is unusual for northern France and justified the creation of a nature reserve Les Landes dHelfaut.