If you are not into Museums and such perhaps the country side ?
http://www.cincinnatisistercity.org/nancy_info.htm
The closet beach will be La Manche where the tunnel is :
http://web.france.com/places/manche
Paris of course has plenty to visit but again you are not interested in Museums
http://www.bing.com/travel/content/search?q=Top+Paris+attractions&cid=tla_sem&FORM=MTRRDT&PUBL=YAHOO&crea=userid1743yhbb4ce77cd55766c32e71709fd66b7de4