Serbia located in/on physical feature Balkans
Serbia ( (listen), SUR-bee-ə; Serbian: Србија, Srbija, pronounced [sř̩bija] (listen)), officially the Republic of Serbia (Serbian: Република Србија, Republika Srbija, pronounced [repǔblika sř̩bija] (listen)), is a landlocked country in Southeastern and Central Europe, situated at the crossroads of the Pannonian Basin and the Balkans. It shares land borders with Hungary to the north, Romania to the northeast, Bulgaria to the southeast, North Macedonia to the south, Croatia and Bosnia and Herzegovina to the west, and Montenegro to the southwest, and claims a border with Albania through the disputed territory of Kosovo. Serbia without Kosovo has about 6.7 million inhabitants, about 8.4 million if Kosovo is included. Its capital Belgrade is also the largest city. 
Continuously inhabited since the Paleolithic Age, the territory of modern-day Serbia faced Slavic migrations in the 6th century, establishing several regional states in the early Middle Ages at times recognised as tributaries to the Byzantine, Frankish and Hungarian kingdoms. The Serbian Kingdom obtained recognition by the Holy See and Constantinople in 1217, reaching its territorial apex in 1346 as the Serbian Empire. By the mid-16th century, the Ottomans annexed the entirety of modern-day Serbia; their rule was at times interrupted by the Habsburg Empire, which began expanding towards Central Serbia from the end of the 17th century while maintaining a foothold in Vojvodina. In the early 19th century, the Serbian Revolution established the nation-state as the region's first constitutional monarchy, which subsequently expanded its territory. Following casualties in World War I, and the subsequent unification of the former Habsburg crownland of Vojvodina with Serbia, the country co-founded Yugoslavia with other South Slavic nations, which would exist in various political formations until the Yugoslav Wars of the 1990s. During the breakup of Yugoslavia, Serbia formed a union with Montenegro, which was peacefully dissolved in 2006, restoring Serbia's independence as a sovereign state for the first time since 1918. In 2008, representatives of the Assembly of Kosovo unilaterally declared independence, with mixed responses from the international community while Serbia continues to claim it as part of its own sovereign territory.
Serbia is an upper-middle income economy, ranked "very high" in the Human Development Index domain (63rd position). It is a unitary parliamentary constitutional republic, member of the UN, CoE, OSCE, PfP, BSEC, CEFTA, and is acceding to the WTO. Since 2014, the country has been negotiating its EU accession, with the aim of joining the European Union by 2025. Serbia formally adheres to the policy of military neutrality. The country provides universal health care and free primary and secondary education to its citizens.Geography
A landlocked country situated at the crossroads between Central and Southern Europe, Serbia is located in the Balkan peninsula and the Pannonian Plain. Serbia lies between latitudes 41° and 47° N, and longitudes 18° and 23° E. The country covers a total of 88,499 km2 (34,170 sq mi) (including Kosovo), which places it at 113th place in the world; with Kosovo excluded, the total area is 77,474 km2 (29,913 sq mi), which would make it 117th. Its total border length amounts to 2,027 km (1,260 mi): Albania 115 km (71 mi), Bosnia and Herzegovina 302 km (188 mi), Bulgaria 318 km (198 mi), Croatia 241 km (150 mi), Hungary 151 km (94 mi), North Macedonia 221 km (137 mi), Montenegro 203 km (126 mi) and Romania 476 km (296 mi). All of Kosovo's border with Albania (115 km (71 mi)), North Macedonia (159 km (99 mi)) and Montenegro (79 km (49 mi)) are under control of the Kosovo border police. Serbia treats the 352 km (219 mi) long border between Kosovo and rest of Serbia as an "administrative line"; it is under shared control of Kosovo border police and Serbian police forces, and there are 11 crossing points.
The Pannonian Plain covers the northern third of the country (Vojvodina and Mačva) while the easternmost tip of Serbia extends into the Wallachian Plain. 
The terrain of the central part of the country, with the region of Šumadija at its heart, consists chiefly of hills traversed by rivers. Mountains dominate the southern third of Serbia. Dinaric Alps stretch in the west and the southwest, following the flow of the rivers Drina and Ibar. The Carpathian Mountains and Balkan Mountains stretch in a north–south direction in eastern Serbia.Ancient mountains in the southeast corner of the country belong to the Rilo-Rhodope Mountain system. Elevation ranges from the Midžor peak of the Balkan Mountains at 2,169 metres (7,116 feet) (the highest peak in Serbia, excluding Kosovo) to the lowest point of just 17 metres (56 feet) near the Danube river at Prahovo. The largest lake is Đerdap Lake (163 square kilometres (63 sq mi)) and the longest river passing through Serbia is the Danube (587.35 kilometres (364.96 mi)).
situated in/on physical feature positioned in/on physical feature found in/on physical feature placed in/on physical feature situated on/at physical feature