Where do you go swimming?

I would prefer to swim in my own swimming-pool. Sadly I can't afford one. Public pools have been closed during the pandemic and there tend to be too many people there who don't know how to behave anyway. The ocean is hundreds of miles away from where I live. I never liked lakes and rivers, I prefer to see where I'm treading, there are too many waterplants and I don't like it when the ground is too muddy.