Interesting photos Graham. It is my goal to have a few ponds like that, but when I do, I will build my house on the side so I can sit on the terrace and fish.
You could do exactly that in that structure Steve, but after testing the strength of the ageing balcony I decided not to use it to even admire the view.
The fish ponds themselves were totally fascinating for me though...a keen naturalist and 'aquarist' all my life.