This area, located in the heart of France, is the modern successor of the old Duchy of Burgundy. It is famous all over the world for its wines. Both the wines and the caves of the area are a result of the geology. Located at the eastern border of the Massif Central, which runs North-South through Dijon and Santenay, lie limestone ridges composed of Upper Jurassic limestones. The continental climate, and the soil which is a result of the eroding rocks, make the base for the production of superior wines. The limestone is karstified and contains caves, not as spectacular as in western and southern France, but nevertheless impressive.