Bulgaria–Serbia border

mountain range in the eastern part of the Balkan Peninsula

The Timok (Serbian and , ), sometimes also known as Great Timok (, ), is a river in eastern Serbia, a right tributary of the Danube. For the last 15 km of its run it forms a border between eastern Serbia and western Bulgaria.

Midžor (, ) or Midzhur (, ) is a peak in the Balkan Mountains, situated on the border between Bulgaria and Serbia. At , it is the highest peak of the Western Balkan Mountains, as well as the highest in Serbia.

mountain in Bulgaria and Serbia

mountain in Serbia

mountain in the country of Serbia

river in Bulgaria