Thanks, all for stopping by and commenting!
Jakov, I tried slower shutter speed at first to blur the water, but, at least in this particular case, the result was not really happening. Then I tried faster shutter speed to freeze the water and liked the preview image.
Andrea, indeed the foreground of the last image was fascinating. I respect the designer of this artificial waterfall!
Armando, I also tried various placements of the space with no water. But the water looked most interesting when seen from the view point of the latter three.