Sure, it's not advisable, and a wetsuit is a necessity, but the fact that it's relatively safe proves that a modern canal city can have clean waters. After all

Sure, it's not advisable, and a wetsuit is a necessity, but the fact that it's relatively safe proves that a modern canal city can have clean waters. After all, there was a royal publicity stunt a decade ago[1], part of what's now an annual event[2]. [1]: https://www.hellomagazine.com/royalty/201209109251/princess-maxima-swims-amsterdam-canal/ https://www.hellomagazine.com/royalty/201209109251/princess-... [2]: https://www.iamexpat.nl/lifestyle/expat-events-festivals/acs-amsterdam-city-swim https://www.iamexpat.nl/lifestyle/expat-events-festivals/acs...