Sonoma, California - Californian wines are now a long established part of European connoisseurs' drinking habits, the most popular of which are varieties from the Napa Valley region.
But the West Coast state is home to another winemaking area, Sonoma, which boasts no less than 4,100 square kilometres of vines.
More than 250 vineyards are located in Sonoma, many of which have a winemaking tradition which is over a century old. A few claim to have roots in Europe's vineyards.