Mumm is one of the largest Champagne producing houses in Reims and therefore one of the largest in the world. It has an output of well over seven million bottles a year. It is possible to visit the cellars of the famous Champagne mark and tour the facilities, seeing the way that one of the most famous and well loved drinks in the world goes from the grapes on the vine, into barrels and eventually into a bottle. The tour lasts about an hour and of course includes a tasting session at the end.