Argentina is one of the world's biggest wine producing countries by volume. Until the end of the 20th century, almost all the wine was made for domestic consumption. Over the last 20 years however, producers have raised the quality levels and now the country is producing world class wines. The most famous grape variety is Malbec, which played a dominant role in winning world wide acclaim for Argentina's wines. The majority of the country's vineyards are located around dry, mountainous areas. high and low altitude lead to increased sunshine levels and higher temperature variation - ideal for developing balanced sugars and acidity in grapes.