Stara planina, Rhodopes, Rila, Pirin, Vitosha, Liulin etc.
Balcan, Vitosha, Rhodopes, Pirin, Sakar
Balkan (stara planina), Rodopi, Pirin, Sakar, Vitosha, Rila
Bulgaria
Bulgaria.
natural: the Balkan range of mountains by public: Hain-Voaz tunnel thr. Balkan
Yes
Mountaneous in many places with extending plains. Daniube alluvial plain land in the North. Great Balkan range of mountains crossing Bulgaria from East to West
Bulgaria major EXPERT... was the question What is Bulgaria's major export... please specify and chech your English grammar and vocabulary
THEY ARE IN EUROPE THEY ARE IN BULGARIA!
Serbia and Bulgaria
The Balkan Mountains run through the center of Bulgaria. They are the longest mountain range in Bulgaria and divide the country into northern and southern regions.
A common mountain range covering Bulgaria and Serbia is called the Balkan Mountains (in Bulgarian also called 'Stara Planina')