Birthdays & anniversaries call for celebration and citytripping in your own country is always a recommendation! Since my boy likes old stories and history, Bruges was the perfect place to go. We stayed at Dukes' Palace, visited the Historium, climbed the Belfry and enjoyed the beautiful historical buildings.
All I can say: Visit Bruges if you haven't already ;)!
P.S.: Sorry Dukes' Palace I raided your L' Occitane toiletries, I just couldn't resist..