In Hamburg, the Alster swimming pool is being modernized. In three years, the aged landmark is to shine in new splendor. But not everything is going according to plan during the work in the Hohenfelde district. The concrete supplied is too viscous and the muddy weather in the Hanseatic city is making life difficult for the "heroes of the construction site". In Heidelberg, "learning by doing" is the order of the day. There, students are building a dormitory. And in the 56-meter-high tower of the Garrison Church in Potsdam, locksmith Daniel Günther and his team are installing custom-made steel stairs.
