Glenfarclas 25 Year Old is the result of 170 years of tradition and experience. Many have wondered at the origins of the unique taste of Glenfarclas. Some believe the secret lies in the tumbling waters of the Green Burn married with fresh highland air. Others believe it is great copper stills, which continue to be direct fired, and some believe the secret is the family's commitment to maturing Glenfarclas in the best oak casks in traditional dunnage warehouses.