It’s hard to believe now, but Germany was once a divided country, and the East was a strange microcosm of icons of that era: Sandmännchen, Jungpioniere, and FKK-Kultur. Not to forget its sparkling ambassador, Rotkäppchensekt. Also hard to believe: a destination for wine fans has now arisen in the area between Chemnitz and Cottbus, Magdeburg and Dresden. And yet, from Berlin, the trip takes you almost 200 kilometers to the south, past Dessau and Lutherstadt Wittenberg, to a place whose name sounds to German ears disturbingly close to “Lauch” (leek). Laucha an der Unstrut has roughly 3,200 inhabitants, a bell museum, and one…...