High Quality Content by WIKIPEDIA articles! Radan, situated in Serbia, is one of the biggest mountains in Southern Serbia. Serbia, officially the Republic of Serbia (Serbian: , Republika Srbija), is a landlocked country located at the crossroads of Central- and Southeastern Europe, covering the southern part of the Pannonian Plain and central part of the Balkans. Serbia has borders with 8 countries, Hungary to the north, Romania, Bulgaria to the east, Republic of Macedonia to the south, and Croatia, Bosnia and Herzegovina, Montenegro to the west, its border with Albania is disputed. Although landlocked, the country has access to the Black Sea through the Danube river. Its capital city, Belgrade, is among the largest in Southeastern Europe. After their settlement in the Balkans, Serbs formed a medieval kingdom that evolved into a Serbian Empire, which reached its peak in the 14th century.