Answer:
Many, many things! Historically, Alsace has been a region of both Germany and France, giving it a unique mixture of French and German culture. Because of the international importance of its capital, Strasbourg, Alsace is politically one of the most important regions in the European Union.
Alsatian cuisine has also become popular beyond Europe; a dish "a l'Alsacienne" means it's garnished with sauerkraut, a traditionally German dish.