The third release in the Signature Series, Duero Discovery showcases the influence of high-quality Spanish red wine casks on Arran Single Malt. This 12-year-old unpeated whisky was initially aged for six years in first and second fill bourbon barrels before being transferred to first fill wine casks from the Duero River region in northern Spain. Matured for a further six years in dunnage warehouse No. 4 and selected by Distillery Manager Stewart Bowman, this ruby amber dram offers a unique and rich expression of Arran’s character.