Near Vinci there still stands a building known as Mulino della Doccia (Mill of La Doccia). It is right here, in his native village, that Leonardo had observed the operation of that hydraulic factory, depicting it on a famous map in the Codex Atlanticus. Leonardo's studies on the calculation of forces deriving from water were based largely on experience. On the hills around Vinci, a landscape familiar to the young Leonardo, there were a great number of mills powered by the rivers that flowed down from Montalbano. Some of these date back to the 16th century and are preserved even today.