I recommand this castle, only 22 minutes by train from Paris-Nord station (the closiest countryside of Paris). This castle houses a magnificent collection of XV-XVI th centuries, as important as the Louvre Museum'one. From Ecouen-Ezanville Station to the castle, you can take the bus 269 and stop at "Mairie d'Ecouen". If you prefer to take a breath, you can walk by the forest' paths (15 minutes walking). Sure you will enjoy Ecouen caste and Museum if you like Art and History.