Undoubtedly the most important viticultural region of the country of Argentina is Cuyo, the arid and red-soiled area within central-west Argentina which produces over eighty percent of the nation's wine each year. Cuyo represents the finest aspects of Argentinian wine making, with wineries in the region celebrating their traditions which stretch back to the sacramental wines first introduced to the country by Spanish settlers hundreds of years ago. As with much of Argentina, Cuyo is most famous for the production of Malbec wines, with Malbec grapes thriving prodigiously in the hot climate of the region, reaching full ripeness in ways they rarely could in their native France, and producing wines of exceptional flavor and quality. The Desaguadero River is the key water source in this otherwise dry and dusty region, and successful irrigation projects have helped bring water to even the driest vineyards within Cuyo. The Pinot Grigio or Pinot Gris grape varietal is now one of the most widely grown vines in the world, due to the surge in popularity of Pinot Grigio wines over the past twenty years or so. These grayish-blue fruits, which hang in their distinctively conical bunches, are responsible for a very broad range of wines famous for their variety of color tones and flavors Pinot Grigio varietal grapes are highly influenced by terroir, climate and particularly the skill and expertise of the vintners who process them. As such, there are full bodied, amber colored wines made from this grape, and there are equally delicious yet far leaner, paler, lighter bodied and crisp white wines made from the same species in other parts of the world.