Comment by coreyh14444

American living in Copenhagen here. We check all of these boxes. The entire channel that runs through town is swimmable thanks to decades of work cleaning it up. On a warm summer day, you could expect maybe 1000+ swimmers in the water in the city centre across all the locations. We also do Vinterbadere (Winter Bathing) throughout the year. The only time you can't swim is after a day or two of sustained rain and there is an app and red/green light system. My family lives on one of the new infill man-made "islands" and we have canals that run through our neighbourhood and you can swim laps around our apartment building.