Hungary is situated in Central Europe, sharing borders to the north with the Slovak Republic, to the northeast with Ukraine, to the east with Romania, to the south with Croatia and Serbia and to the west with Austria and Slovenia. There are several ranges of hills, chiefly in the north and west. The Great Plain (Nagyalföld) stretches east from the Danube to the foothills of the Carpathian Mountains in the CIS, to the mountains of Transylvania in Romania, and south to the Fruska Gora range in Croatia. Lake Balaton is the largest unbroken stretch of inland water in Central Europe.