A couple of miles from O Rosal the road begins to climb gently into the mountains. Built to harness the Picon and Folon rivers, the first mill dates from 1702, with 60 eventually completed. They remain well preserved and linked by a hiking trail. Despite their entirely functional purpose, they manage to have a wonderful symmetrical pattern in two areas. The trail sneaked up the Campo do Couto  mountain and the mills started to come into the view. They are in surprisingly good condition, with small irrigation channels running between them. The water usually runs directly through the mills, which…