Centro Region, Portugal known as the Princes of Beira. Along the region’s mountainous border with Spain are a series of fortresses and castles that once protected the country from its many invaders. Over the centuries, Moors, Christians, Spaniards and Portuguese have all tried to take these villages, but their higher elevations usually gave them a distinct advantage. On that border, the more than one dozen fortified frontier villages beckon today’s visitors to come explore a 900-year history — full of the heroism, epic battles and romance upon which Portugal struggled to become a nation. Today, Portugal boasts the longest-standing border in all of
Lithuania–Poland border Lithuania–Poland border The current Lithuania–Poland border exists since the re-establishment of the independence of Lithuania on March 11, 1990. Until then the identical border was between Poland and Lithuanian SSR of the Soviet Union. The length of the border is . It runs from the Lithuania–Poland–Russia tripoint southeast to the Belarus–Lithuania–Poland tripoint. It is the only land border that the EU- and NATO-member Baltic states share with a country that is not a member of the Russian-aligned Commonwealth of Independent States. To the military planners of NATO, the border area is known as the Suwalki gap (named after the nearby