The activity carried out over 2000 years ago by Valtellina winemakers can certainly be described as heroic. The steep slopes of the valley did not seem at all suitable for cultivation, but thanks to the ingenuity of the farmers of that time it was realized that in these areas, kissed by the sun for long periods of the year, it could grow excellent grapes: it was only necessary to create the appropriate structures. Thanks to an immense amount of work, 2,500 kilometers of dry stone walls have sprung up, stretching for 50 kilometers along the entire Valtellina wine-growing area: thousands of stones, laid with painstaking care, now form the largest terraced wine area in the world, these sunny slopes, before being harvested with care, bunch after bunch, from the hand of man. The Mediterranean climate and particularly favorable soil conditions complete the list of factors that make the production of high quality wines possible. Nebbiolo.