Along the banks of the River Lima, the Ecovia stretches for around 70 kilometres through the municipalities of Viana do Castelo, Ponte de Lima, Ponte da Barca and Arcos de Valdevez. Rural riverside paths, meadows, fishing grounds on the route to the lamprey spawning grounds and wooden walkways cross the Protected Area and Wetland of International Importance of the Lagoas de Bertiandos and S. Pedro d’Arcos. This entire area is part of the Natura 2000 Network, and is therefore a wealth of natural and cultural wealth. Some municipalities are part of the World Biosphere Reserve and others are part of the Peneda-Gerês National Park.