Zinfandel may not have originated in California — studies show it to be an ancient grape variety likely from Croatia — but no other place in the world has adopted Zin as the Golden State has, making it a signature variety of sorts. Historically considered to be a less-noble grape (hence the origin of the low-alcohol, overly sweet White Zinfandel), the best, true red Zinfandels are boldly juicy and full-bodied, sometimes reaching 15 or 16 percent ABV! Get to know more about California’s adopted grape with our illustrated guide.