Between the 18th and mid-20th centuries, the Tiana landscape beside the waterways was dotted with mills and fulling mills, on which the town’s economy was based. Today, the only piece of evidence of all this is even more important because it is the last fulling mill active on the Island and one of very few still remaining in Europe. Along the Rio Torrei, there is a complex made up of a mill and two fulling mills - one of them, the active one, is known as sa Cracchera de Tziu Bellu – and, together, they make up the industrial archaeology museum of ‘Le vie dell'acqua’ (water routes). The water mill was used for grinding wheat, which was widely grown in the area, while the fulling mills were used for fulling the wool, i.e. beating it to obtain felting. Tiana was particularly specialised in the processing of orbace, a fabric obtained through a particular process of spinning sheep’s wool, widely used in the past to make traditional clothes.