About an hour's drive south of Calais, the walled town of Montreuil-sur-Mer sits high above the valley of the river Canche.
It usually takes less than one hour to reach Montreuil-sur-Mer from Calais.
mnli hypothesis: It usually takes less than one hour to reach Montreuil-sur-Mer from Calais. premise: About an hour's drive south of Calais, the walled town of Montreuil-sur-Mer sits high above the valley of the river Canche.