Viura is also known as Macabeo. These are both the exact same white grape. Primarily grown in Spain and France, Viura is rarely drunk as a stand alone grape in a wine - usually used as a blending wine which goes into Cava, the Spanish sparkling wine similar to France's Champagne
Viura isn't known as an aging wine. It has light flavors of flowers and almonds, Being a high yield grape Viura is often used as a bulking-out wine to add volume to other stronger flavor grape varieties.