If your trip to Montesson is all locked in but your travel itinerary is a bit on the empty side, let us give you a few hints and tips.Theatre Andre Malraux and Grande Arche are some cool attractions that everyone should make time to visit. Plan a route and spend an hour or so exploring each one.Plan a stop at Chateau de St-Germain-en-Laye. It's one attraction you'll usually find on most travelers' must-do lists. Chateau de Monte-Cristo and Château de Maisons are also not far away and worth a pit stop.