Maipo Valley is northernmost within Chile’s Central Valley, and it is one of Chile's most prominent wine regions. Located south of the capital city, Santiago and north of the Rapel Valley, it nestles between two mountain ranges, the Andes to the east and the Coastal Range to the west. Three of Chile's oldest wineries are based in the Maipo Valley: Cousino Macul (1856), Concha y Toro (1883) and Santa Rita (1880). The rainfall in Maipo is very low, and the climate is both warm and dry, so drip irrigation is used by viticulturalists. Maipo is renowned for its exceptional Cabernet Sauvignon, which amounts for over 60% of production. However, Merlot, Chardonnay and Carmenere are also important grape varieties for the region.