I am by Poissy, Yvelines, dept 78 ile de France. Near me. This is a royal town of France, kings came here ,and one was born nearby and baptised here Louis IX, future Saint Louis.
The town is very easy to get from Paris on the RER A at several locations, and the SNCF trains from gare Saint Lazare. Also, the road A13 autoroute de normandie takes you to exit 7 and Poissy very easily. Plenty of parking by pl de la Republique and the gare RER. The ile de France transport site is www.transilien.com
The main thing to see here of course is the Collegiale de Notre Dame, a church where the main figure of Louis IX is known. He was baptised here on April 25, 1214AD, and the urn of stone is still kept in the church. He later became Saint Louis. Inside you can see statues of him and his daughter Isabelle of France from 1300. webpage from the city of Poissy in French; http://www.ville-poissy.fr/fr/decouvrir-poissy/sites-et-monuments/la-collegiale-notre-dame.html
and the parrish site of the church, http://paroisse-poissy-78.catholique.fr/spip.php?rubrique37 , and the city tourist office http://www.poissy-tourisme.fr/fr/histoire-et-patrimoine/la-collegiale-notre-dame/
You can see inside an abbey a wonderful toys museum ; Musée du Jouets de Poissy, right by the enclos de l’abbaye, that also has a nice park open to walkers, but close otherwise. See the museum info in French here, http://www.ville-poissy.fr/fr/loisirs/vie-culturelle/musee-du-jouet.html ; the admission is 4€ and the hours are open from Tuesdays to Sundays from 9h30 -12h and 14h -17h30. Closed Mondays and holidays.
One of the great liquors of France is here too, La Distillerie du Noyau de Poissy 105, rue du Gal-de-Gaulle , and one of the oldest too since 1698, the secret blend is not known but its delicious, see more here http://www.noyaudepoissy.com/
la villa Savoye consider also known as “Heures Claires” or clear hours was built between 1928 to 1931 over a terrain of 7 hectares ,and it was the end of the cycle of white houses of architect Le Corbusier. See it at 82, rue de Villiers ,and more info at webpage http://www.monuments-nationaux.fr/en/search/?q=villa+savoye
Another nice place, and I have gone just to walk and relax especially after a hectic work day is at Le Parc du château de Villiers with its mini farm or ferme at Avenue du Bon Roi Saint-Louis bordering the river Seine. The castle is not visited thus ,still private.
And the third best market outside of Paris is here at the covered market of pl de la Republique across the street from the mayor’office or hotel de ville and theater of the city; The mayor’s office is open on heritage days, the rest any time, and the covered markets are from 1825.
In all is a very pleasant town that needs to get more attention from the many visitors that past by Paris,and ask me what is there to see outside Paris, well this is one of them. Enjoy the photos;Cheers.