One of the Napa Valleys hidden treasures. Chappellet Winery sits in the... One of the Napa Valleys hidden treasures. Chappellet Winery sits in the eastern hills of the Napa Valley (an area called Pritchard Hill) and produces some of the world's most compelling Cabernet Sauvignons. The tour and tasting experience at Chappellet is consistenly rated amongst the finest in the region.