Romania (Capital city: Bucharest) is bordered to the north and east by Moldova and Ukraine, the southeast by the Black Sea, the south by Bulgaria, the southwest by Serbia and in the west by Hungary. The country is divided into four geographical areas. Transylvania (a belt of Alpine massifs and forests) and Moldavia compose the northern half of the country, which is divided down the middle by the northsouth strip of the Carpathian Mountains. South of the eastwest line of the Carpathians lies the flat Danube plain of Walachia with the capital Bucharest, its border with Bulgaria being defined by the course of the Danube. Romanias coastline is along the Black Sea, incorporating the port of Constanta and the Danube Delta. The region between the Black Sea and the Danube (after it veers North), is also known as Dobrudja (Dobrogea).