The Limestone Coast in South Australia is located in the south-eastern corner of the state, bordering Victoria in the east. It is one of the most significant wine zones of the country, producing nearly one-third of South Australia's quality wines – some of which are the most highly acclaimed in Australia. The feature responsible for producing such high-quality wines is its soil. As the name suggests, limestone forms the basis of the soil here, best represented by the famous 'terra rossa' of Coonawarra. A wide range of grape varieties of both colors perform exceedingly well in the Limestone Coast, but its red wines are of particular importance. Cabernet Sauvignon produces some of the most sought-after wines, with Shiraz and Merlot also prominent. The cooler parts of the zone are suitable for white varieties such as Chardonnay, Sauvignon Blanc, Riesling and Viognier.