Rambouillet is a cute little French village that is about an hour and a half drive south west of Paris. The main attraction in the town is the Chateau Rambouillet. Other than the Chateau, you can walk around the city and the park. Its a great stop if you need to get out of Paris for a half day.
To figure out the significance of the chateau, translate this plaque by going to http://www.babelfish.altavista.com/