Napa Valley is the most famous and iconic winemaking region in California, as well as one of the most celebrated wine regions in the world. The region is known primarily for its Cabernet Sauvignon wines, which accounts for nearly 60 percent of the region’s total wine production. Four other grape varietals - Chardonnay, Merlot, Sauvignon Blanc and Pinot Noir – are also popular in Napa Valley.