I'm not sure where (or if) this belongs in the forum. I still haven't seen this place in person despite driving through North Minneapolis a couple of times per week during the summer.
http://www.startribune.com/north-minneapolis-natural-filtration-pool-closed-for-days-during-heat-streak-due-to-poor-water-quality/487435361/
http://www.startribune.com/north-minneapolis-natural-filtration-pool-closed-for-days-during-heat-streak-due-to-poor-water-quality/487435361/