California's wineries and wines have had combined fortunes over thee past 100 years, chiefly following the exclusion that ended in 1933. This has lead to some of the wine critics releasing their wines in the 50s and 60s. Much has altered after that mainly due to the efforts of Robert Monday. Winemakers in California have it simple, actually less vintage difference than in Europe, and more and more of sun. Plus they could plant what they desire, where they need, made in the fashion that they want.
Napa is where California's most renowned wineries are based. It even has defended name status in the EU now the initial such gratitude of an American wine place name, combining the likes of Champagne, Jerez and Chianti Classico. All of this makes California an thrilling place for wine country tour visitor and of course Californian wine is an exciting thing to drink.