I do swim in our lake, Lake Anna, Virginia. I do not do laps, but swim from dock to dock sometimes. I also kayak, paddle board and jet ski. (Jet skiing is supposed to burn lots of calories, but I sort of doubt it does!) Our lake is very clean and lovely to swim in. And when it's humid, it's the best!!
I like the beach too. We go to North Carolina for a week every summer. I do not often swim in pools.