From Rila mountain crossing the full length of Bulgaria to be poured in BLACK SEA. Longest river in Bulgaria
The word "strumica" is a river in the Republic of Macedonia. This river is about 114km long. 75% of the river is in Macedonia, and the other 25% is in Bulgaria.
The Danube River forms part of the boundary between Bulgaria and Romania.
This river is called Danube. Its a northern border to Bulgaria and for Romania the south bound.
The norther border of Bulgaria is delineated by the Danube river. I don't know of any other river that goes "through" BG.
Daniube
Romania and Bulgaria border one another and are separated by the Danube. There is no country 'in the middle'.
Iskar river (if we dont count International river Danube)
no its in hungary
The River Danube forms the southern border of Romania. The next country to the South is Bulgaria. The River Danube is famous for the waltz of the same name.
Follow the river Danube to Belgrade, then turn to the river Sava, which will lead you to Slovenia.
Danube