wonderful institutions in Poissy, the Chateau is not visited, but you can go into the park,and walks its lustrous trees and shapely trims, wonderful small lake, and little farm. You go into the parc and its just beauty looking down on escalated hills towards the road N13 and the river Seine.
just outside city limits, but can be walk from train station in about 15 minutes.
rather unique combination since 1935 of a city hall or hotel de ville and a theater, salle Moliére now full theater since 1937. right across from covered market. Cant missed it,great performance in an unique setting.Easy from SNCF or RER train station walks to this.