A swimming pond

I have been looking at a swimming pond. Note, I am looking at it and the Boy Stones are swimming in it! It is a bit nippy for me.
I am fascinated by the design. It has a part  which is planted up with oxygenating plants that clean the pond and a larger part that is open, with no plants in, for swimming in. It is Brilliant. All the animals from insects to birds, small mammals and children are all benefiting.

A great idea that I would love to copy one day.