Portugal–Spain border NATO 2010 Lisbon summit and during Pope Francis's visit to Fátima in May 2017. Portugal's maritime borders, also known as the Exclusive economic zone of Portugal is currently disputed by Spain in the Savage Islands area, between Madeira and the Canary Islands. The main crossing point between Portugal and Spain is Vilar Formoso - Fuentes de Oñoro. Other important crossings are Caminha and Bragança to Galicia, Portalegre and Elvas to Badajoz, and Castro Marim and Vila Real de Santo António to Ayamonte. Bridges across the border include the Guadiana International Bridge and the Lower Guadiana International bridge. A zipline across
Border Reivers were other factors which promoted a predatory mode of living in the Borders. A system of inheritance called gavelkind meant that estates, and particularly land, were divided equally between all sons on a man's death; although this was considered more fair than primogeniture, it also meant that many people owned insufficient land to survive. Also, much of the border region is mountainous or open moorland, unsuitable for arable farming but good for grazing. Livestock was easily rustled and driven back to raiders' territory by mounted reivers who knew the country well. The raiders also often removed easily portable household goods