It is, frankly, amazing. I've never seen infrastructure of this kind so close to the people, so sprawling and so well kept. People swim in side arms of the Isar too, many floating (see pictures near the start at https://maps.app.goo.gl/krgaM2tTKdzCzW398, where people surf on the mini-river).
Of the places I've been, Munich is by far the best one in this area (and many others) that I know.
It surprises me that no-one has mentioned Munich's premier city park though: the English Garden (Englischer Garten): https://maps.app.goo.gl/ug5fg8KUBHPWvRPD7.
It is, frankly, amazing. I've never seen infrastructure of this kind so close to the people, so sprawling and so well kept. People swim in side arms of the Isar too, many floating (see pictures near the start at https://maps.app.goo.gl/krgaM2tTKdzCzW398, where people surf on the mini-river).
Of the places I've been, Munich is by far the best one in this area (and many others) that I know.