The region of Northern France referred to in the crossword solution is Normandy. It is a region located in the northern part of France, and is known for its beautiful coastline and beaches. It is also home to many historical sites, including the Bayeux Tapestry and the D-Day landing beaches. Normandy has a rich cultural heritage, with many traditional dishes, customs, and festivals. It is also an important agricultural region, producing dairy products, apples, and cider.