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
Norway–Russia border do not travel outside a zone from the border. Negotiations on the outside marine border were initiated in 1970. Norway claimed, in accordance with the United Nations Convention on the Law of the Sea Article 15 and the Convention on the High Seas, that the border should follow the equidistance principle, the border being defined by midpoints between the nearest land area or islands, as is normal practice internationally. The Soviet Union claimed, based on a decision by Joseph Stalin from 1926, which was not recognized by any other country than the Soviet Union, that a "sector principle" should apply,