A republic of southeast Europe on the northern Balkan peninsula. Serbs settled the region in the 6th century and formed an independent kingdom in the 10th century. Dominated by the Ottoman Empire...
Serbia is located in Central-Southeastern Europe, and borders Hungary, Romania, Bulgaria, Macedonia, Bosnia-Herzegovina, Montenegro and Croatia.
boundary line (a line indicating a boundary, as on a map)
the geographical boundaries of Patagonia are Wyoming and Montana.
it is china and mongoliarussia and spainjapan and franceaustralia to californianow that is some examples of a political and a natural boundary