Note the scale of the project by the size of the men preparing the ground and the position of the trees. Most people think that if you have wet ground or a natural spring, you can harness it, in other words, to control it to feed a man-made 'Natural Pool'. Usually though, this is no more than a romantic notion! The power of nature is colossal and water will go where it wants to go, which is usually not where you want it to go! So you have to live with that and go to great lengths not to upset Mother Nature, otherwise she will ruin your naïve plans!