Bulgaria /

Bulgaria ( /bʌlˈgɛəriə/; Bulgarian: България; officially the Republic of Bulgaria Република България, translit. Republika Bulgaria, [rɛˈpublikɐ bɤ̞ɫˈɡarijɐ]), is a country in Southeast Europe. Bulgaria borders five other countries: Romania to the north (mostly along the Danube), Serbia and the Republic of Macedonia to the west, and Greece and Turkey to the south. The Black Sea defines the extent of the country to the east. With a territory of 110,994 square kilometers (42,855 sq mi), Bulgaria ranks as the 15th-largest country in Europe. Several mountainous areas define the landscape, most notably the Stara Planina (Balkan) and Rodopi mountain ranges, as well as the Rila range, which includes the highest peak in the whole Balkans - Musala. In contrast, the Danubian plain in the north and the Upper Thracian Plain in the south represent Bulgaria's lowest and most fertile regions. The 378-kilometer (235 mi) Black Sea coastline covers the entire eastern bound of the country.