One of the few chateaus that I have been to outside of Loire, the Château de Fontaine-Henry is located in Normandy and I basically stumbled upon while out and about explore the backroads of this beautiful region.
It is unique in it is one of the few chateaus that has never been sold in its entire history, it is fully furnished and lived in by its owners. It is claimed to have the highest rooftops of France and is an interesting mix of architecture styles.
The Nazis took it over during WWII and you can still see remnants of their presence in the garage area. The furnishings throughout the chateau are spectacular.
Also once a year they hold a massive culinary event called "Château Gourmand" how can you beat that?