The restaurant at Burg Altena serves traditional German and Westphalian dishes in a setting that lives up to the surroundings — stone walls, timber beams, and views over the Lenne valley. The menu covers the expected range of schnitzel, roast pork, and seasonal soups, with a decent selection of Sauerland beers. It is the obvious choice for lunch after visiting the castle museum, and the terrace is pleasant in summer. Quality is reliable if not exceptional, which is about right for a castle restaurant.