Ay, France. Ay is a small town located in the Champagne region of northeastern France, known for its champagne production and historic buildings. Visit the Mercier Champagne House and take a tour of its extensive underground cellars. Explore the picturesque streets of the old town and admire the medieval half-timbered houses. Enjoy a leisurely stroll along the Marne River. Ay offers a blend of champagne heritage and French charm.