The tall thing in the middle of the picture is a kind of fountain in the square outside the opera house in Cardiff Bay. It's metallic and water runs down the sides. The water had clearly reached terminal velocity by about 1/3 of the way down. It was no longer accelerating. This is because the water is hugging the surface so there are drag forces between the surface and the water. By 1/3 of the way down, they must equal the pull of gravity on the water.
