Salta
Salta is a wine region in the far northwest of Argentina not far from where the country borders Chile and Bolivia. It is a new frontier of sorts with some of the most extreme and remote vineyards on the planet. At a latitude of 24 degrees south (on a parallel with Alice Springs in the south or the Sahara as a northern equivalent) one would think it impossible to make wine, but the latitude is counterbalanced by vineyards at extreme altitudes on the east flank of the Andes--some reaching nearly 10,000 feet!
The resultant UV extremes can see daytime temperatures in the vineyards getting as hot as 100 degrees F in summer before crashing 50 degrees or more overnight. This results in a long growing season that provides varietal intensity and good acidity. While Malbec and Cabernet are grown, Merlot and even the Uruguyan specialty Tannat are being experimented with as cooler climate options. Unsurprisingly, the region has also begun to garner a reputation for intense whites from Torrontes and Chardonnay.