Alentejo, in southern Portugal, is one of the largest appellations in the country, covering about one-third of the nation's land mass. There are eight small sub regions (e.g., Redondo, Borba), but these are rarely seen on a label. Most of these are clustered together, while Portalegre is situated to the northeast, where there is higher rainfall and cooler temperatures; there are many old vines found here as well. A variety of soils, such as granite, schist and limestone can be found throughout the region. The best white wines are made from the Antao Vaz variety; this has good acidity and tropical fruit flavors; many examples are barrel fermented. For reds, the Argonez variety, better known as Tempranillo, is the base of the finest reds, while Alicante Bouchet is also widely planted. As of late, a few international varieties, such as Cabernet Sauvignon and Syrah have been planted and incorporated into blends. (Wine/Appellations)