Formal water features you find often in commercial parks or buildings as shopping-malls.
Also fountains are often based in a formal pond.
Often the basin is poored with concrete, but I would not suggest to do something like this
on your own, if you are not experienct in concrete work.
Also it takes quiet time, before your basin is ready to use.
And if ever a problem accures, like a crack, it will be an expensive fix.
Still the designs are very interesting and can often be accomplished with other methods
like liner also.