This valley has received worldwide acclaim because its particular soil and climate conditions allow wine grapes to mature under the most natural conditions. Enormous wine estates have emerged here in the Cachapoal and Colchagua Valleys, of which the Rapel Valley is formed. The soils lend themselves to the production of fine red wines, such as Cabernet Sauvignon, Merlot, Carmenere, Syrah and Cabernet Franc. In some areas of the Rapel Valley, fine white wines including Chardonnay, Semillon and Sauvignon Blanc are produced. The Colchagua Valley in particular is internationally acclaimed for its wines, grown in its rich soils and cool, coastal climate.