Can't get much easier then this:
If you type "fish pond" in the search box and hit enter you will find quite a good number of ideas. I have chosen a few for you, but there are many more. Hope this helps.
You could use a patio pond like the one I have from Aquascape: http://momhomeguide.com/my-new-patio-pond-a-patio-pond-giveaway/
Here is another idea for you https://www.ohmy-creative.com/home/garden/diy-backyard-pond-landscape-water-feature