Not many people realise it, but the cooler, high-altitude areas of Argentina’s Uco Valley are producing some delicious white wines at the moment, most notably from Chardonnay. This deftly wooded example from Sebastián Zuccardi, made with grapes from El Peral and Gualtallary, is wonderfully focused, direct and refreshing, with layers of lemongrass, citrus peel,  fennel and oyster shell, mouth-watering acidity and a stony, tapering finish.