Bulgaria, or Republic of Bulgaria, a country in southeastern Europe occupying part of the Balkan Peninsula. It fronts on the Black Sea and is bordered by Romania, Serbia and Montenegro, Macedonia, Greece, and Turkey. Bulgaria has an area of 42,823 square miles (110,912 km2). Maximum dimensions are about 310 miles (500 km) east-west and 190 miles (310 km) north-south.Bulgaria is a country in southeastern Europe.
Romania, or Rumania, a country of Europe. It is in the Balkans, bounded by Ukraine, Moldova, the Black Sea, Bulgaria, Serbia and Montenegro, and Hungary.
Hungary, or Republic of Hungary, a country in eastern Europe. It is bordered by Ukraine, Romania, Serbia and Montenegro, Croatia, Slovenia, Austria, and Slovakia.