As one might expect, the U.S.A. is a hugely diverse country from a wine making point-of-view. Undoubtedly the most important wine making area by volume and by value is that of California. Forget any preconceptions that you may have of over-blown Chardonnays and sickly sweet Cabernets. They do exist but they are now vastly outnumbered by balanced, complex and exceptionally well-made expressions of the classic varietals. The U.S. is an extremely exciting wine-producing country.