The Chouara Tannery, located in the ancient medina of Fes el Bali, Morocco, is one of the oldest and largest tanneries in the world, dating back to the 11th century. Situated near the Saffarin Madrasa, the tannery is renowned for its traditional leather processing methods. Tourists can observe the tanning process, which involves soaking hides in large stone vats filled with natural dyes and white liquids to clean and soften the leather. The vibrant colours and bustling atmosphere make it a fascinating destination for visitors interested in traditional crafts and cultural heritage.