This part of France has no historical or cultural common identity in itself, it is just a way to indicate a strip of land from the Eastern borders to the Atlantic Ocean.
The Western parts are famous for the seafood, including oysters from Oléron Island. Many dishes that are regarded as typical from the French Cuisine actually come from the region of Auvergne. Burgundy includes the town of Dijon, where the Dijon mustard comes from.
This part of France includes 2 of the most famous wine regions of France: Burgundy and the Loire Valley, while the Charentes are known for Cognac and its derivative, Pineau des Charentes.