The Weather Channel had an interesting click-bait feature a few days back; the 'best' swimming spot in every United States state. Being someone who swims for exercise and doesn't mind a dip in a lake, ocean, or river, I found this interesting.
I've actually been to eight of them (though I didn't necessarily go swimming at all eight), which somewhat surprised me. And I've been close to three more, one of which really disappoints me that I didn't visit it (Oneonta Gorge Falls in Oregon).
Since summer is coming, this is a good reference for some good ol' time fun.