The Peneda-Gerês National Park is considered by UNESCO as a World Biosphere Reserve. It is one of the biggest natural attractions of Portugal, for the rare and impressive landscape beauty and for the ecological and ethnographic value and for the variety of fauna (bucks, garranos, wolves, birds of prey) and flora (pine, yew, chestnut, oak and several plants medicinal). It extends from the Serra do Gerês, to the South, passing through the Serra da Peneda to the Spanish border.