Everyone visiting Northern France, especially when staying at Pres De La Foret a perfect place for touring the region, needs to visit Berck-sur-Mer between April 12th and 21st to visit the fantastic Kite Festival, along the sea front. Really a sight to see.
Arras is very often passed over for the larger more exotic cities. However, last time I was there I took trip to see the beautiful and majestic cathedral, and the a visit to, ( for the garden lovers) there is no better place than Les Jardins at Séricourt