Norbert Witte once had a dream to turn Spreepark in the Berlin district of Treptow-Köpenick into the largest amusement park in Germany. Instead, this fun fair fief ended up bankrupting the park. In 2002, he moved to Peru with his family and a large part of the fairground rides, leaving behind a pile of scrap metal and a mountain of debt for the city of Berlin. 　　But the big break...