Arnoia River through Allariz Nature · Allariz, Allariz - Maceda, Ourense With 87 kilometres of course, the Arnoia crosses the district from east to west and drove the mills and tanneries of the Portovello quarter; its banks were restored as a riverside park within the urban planning project awarded a prize in 1994. Photo: Froaringus (CC BY-SA 3.0) What to see and do in Allariz