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
Norway–Russia border that police and customs authorities would have to be regularly stationed at the border. A large amount of the initial traffic was from Russians who sold crafts and souvenirs at markets and fairs throughout Finnmark. From 1992 Norwegian authorities introduced limitations on the activity, resulting in a reduction in trans-border traffic. However, by 1998 the traffic had nearly hit 100,000. From 1991 to 1999 (Poland joining NATO), Norway was the only NATO country to share a land border with Russia. This caused a decrease in allied interest in Norway's border issue, leaving Norway more to itself in managing the relationship.