Mont St Michel is actually in Normandy, not Brittany. I wonder why that picture "source" shows as Brittany. Just a bit west of Mont St Michel in Brittany is St Malo, also a wonderful place to visit. Jacques Cartier is buried within St Malo Cathedral. The entire Commune of Normandy is fantastic to see. In addition to Mont St Michel and the WWII history, you also have some wonderful towns, excellent copper work for purchase, and Calvados.