Swimming pool water refraction - GIF

Swimming pool water refraction.

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Previously:

https://www.homemadetools.net/forum/...696#post193769
https://www.homemadetools.net/forum/...257#post204042
https://www.homemadetools.net/forum/...953#post202790
https://www.homemadetools.net/forum/...057#post157223

There is a cool pool like that at the Cleveland Clinic in Cleveland, Ohio. But you cannot swim in it. Well I guess you could swim in it, but I do not think they would be happy. Most fascinating to me is how level it is all around both inside and outside edges.

https://www.youtube.com/watch?v=v44uAzq8GBc