Champagne, Parmesan, Dijon-–these are all names that instantly make us think about specific products, but have we actually tried them? Maybe, if the products in question came from specific parts of France or Italy. Many names we use for common things are actually geographical markers or protected designations of origin (PDO) —meaning that they can only be used for products elaborated in a specific part of the world— or fall under a similar legal label. Here are some PDOs that we use constantly, and some so common that they have become generic.