Friuli, not too vast for viticulture due to its mountainous terrain, is divided into two zones: to the south and east, the soil is rich in marl, clay, and marine sediments, which produce robust wines; while to the west and center, the soils are composed of clay, limestone, and sand, producing leaner wines. This region prides itself on being the home of white wines in Italy, where, for about 20 years, international varieties have given way to native varieties such as Malvasia Istriana, Tocai Friulano, Vitovska, and Ribolla Gialla, especially in the production of the 10 DOCs, the most famous of which are Collio, Carso, Friuli Isonzo, and Friuli Colli Orientali. There are four DOCGs, including Colli Orientali del Friuli Picolit, a highly sought-after sweet passito wine. Red grape varieties such as Pignolo, Refosco dal Peduncolo Rosso, and Schioppettino complete the production of world-famous wines.