When I moved to Hamburg in 2018, I bought a bike in my first week. After that, almost every day after work, I was just jumping on it and cycling around the city without any direction. That is how I discovered places like Niendorfer Gehege, Haynspark and the Stadtpark. The first time I ended up in the Stadtpark, the thing that struck me was the amount of trees. I was cycling through the city and suddenly I found myself in a wood. Then came the Planetarium with its red bricks, and the huge lawn in front of it, and I was amazed by the size of the whole park. Every big city has its own city park. Central Park in New York, Hyde Park in London, the Englischer Garten in Munich, the Tiergarten in Berlin. Those are the ones that come to mind. The Stadtpark is smaller than all of them and almost nobody outside Hamburg knows about it. But it was planned from the start around what people would do in it, rather than only around how it would look, and more than a hundred years later it still works that way.…