Bor is a city and the administrative center of the Bor District in the Timok Valley in eastern Serbia. According to the 2022 census, the city administrative area has a population of 40,845 inhabitants.(According to the 2011 census, there were 48,615 inhabitants.)

The Carpathian Mountains or Carpathians are a range of mountains forming an arc across Central Europe. Roughly 1,500 km (930 mi) long, it is the third-longest European mountain range after the Urals at 2,500 km (1,600 mi) and the Scandinavian Mountains at 1,700 km (1,100 mi). The range stretches from the far eastern Czech Republic (3%) and Austria (1%) in the northwest through Slovakia (21%), Poland (10%), Ukraine (10%), Romania (50%) to Serbia (5%) in the south. The highest range within the Carpathians is known as the Tatra mountains in Poland and Slovakia, where the highest peaks exceed 2,600 m (8,500 ft). The second-highest range is the Southern Carpathians in Romania, where the highest peaks range between 2,500 m (8,200 ft) and 2,550 m (8,370 ft).