Portugal–Spain border the border exists between Sanlucar de Guadiana in Spain and Alcoutim in Portugal; it is the first and currently only zip line over an international border. Portugal–Spain border The Portugal–Spain border is the international boundary between Portugal and Spain. Referred to as "la Raya" in Spanish and "A Raia" in Portuguese (the stripe), the current demarcation is almost identical to that defined in 1297 by the Treaty of Alcañices. It is one of the oldest borders in the world. The Portugal–Spain border is 1,214 km (754 miles) long and considered the longest uninterrupted border within the European Union. The border
Anglo-Scottish border residing in Northumberland (3.72% of the county's population); the overall percentage of Scottish-born people in England is 1.62%. Anglo-Scottish border The Anglo-Scottish border between England and Scotland runs for 96 miles (154 km) between Marshall Meadows Bay on the east coast and the Solway Firth in the west. It is Scotland's only land border with another country, and one of England's two (the other being with Wales). The Firth of Forth was the border between the Picto-Gaelic Kingdom of Alba and the Anglian Kingdom of Northumbria in the early 10th century. It became the first Anglo-Scottish border with the annexation