Dortmund, the largest city in the Ruhr area, was once dominated by the heavy industries of coal and steel and is today a high-tech manufacturing city. From a city that shows its modernity all around, there are still tell-tell signs of its ancient past. Admire the famous Dortmunder U tower, a landmark since 1927 and once home of the Dortmunder Union Brauerei, for a while the most productive brewery in West Germany. The “U” on top was added...