Bulgaria
Bulgaria.
Yes
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')
Bulgaria and Serbia.
Bulgaria
Yes, it has lots of hills and mountains.
The Rila Mountains are in Bulgaria.
Stara Planina (balcan)