In addition to studying the models, usually located in the artist’s studio, Leonardo also learned to make sketches of nature, important for future works. This sketch was executed when he was still an apprentice.
In the upper left corner, in his own characteristic mirror letter, it is written: “on the day of snow – the miracle of St. Mary, August 5, 1473” This sketch only shows the valley, surrounded by hills, the horizon, and, with a small effort of imagination, the sea. Probably, first a sketch was made in a pencil from nature, and then – a pen and ink.
Related Paintings 
Self Portrait by Leonardo Da Vinci 
Beautiful Ferronera by Leonardo Da Vinci 
The Adoration of the Magi by Leonardo da Vinci 
Madonna with spinning wheel by Leonardo Da Vinci 
Saint Anna and Mary with the Infant Christ by Leonardo Da Vinci 
Paisaje Arno – Leonardo da Vinci 
Warrior in helmet and armor by Leonardo da Vinci 
Ginevra Benci by Leonardo da Vinci
Self Portrait by Leonardo Da Vinci Beautiful Ferronera by Leonardo Da Vinci The Adoration of the Magi by Leonardo da Vinci Madonna with spinning wheel by Leonardo Da Vinci Saint Anna and Mary with the Infant Christ by Leonardo Da Vinci Paisaje Arno – Leonardo da Vinci Warrior in helmet and armor by Leonardo da Vinci Ginevra Benci by Leonardo da Vinci