"Hokusai Meets Fibonacci Golden Ratio" by Ars Brevis This is an example of the golden ratio. The wave creates the curved effect which is pleasing to the eye. It has a rhythm to it, like you are counting up to the curve of the wave.
"The Golden Rectangle, the Golden Triangle, and the Golden Pyramid, all based on the Golden Ratio are all appear prominent in the work of Leonardo Da Vinci. He referred to the Golden Ratio as the "divine proportion".