Freiburg im Breisgau

Freiburg im Breisgau needs 1 day: the Gothic cathedral with its openwork spire, considered one of the most beautiful in Germany, and the «Bächle», small water channels running through the old town streets since the Middle Ages, on the same walk. April-September is best. It's cheaper than Munich. It's the German city with the most sunshine hours per year, the gateway to the Black Forest, and a European pioneer in solar energy and sustainable urban planning, with an entire district (Vauban) designed without private cars as a model eco-city.