Why go
Use the landscape to shape the trip: the Danube connects northern and eastern Serbia, while the Drina and Ibar help orient the west and southwest. Tara, Uvac Gorge and the Balkan Mountains reward attention to terrain rather than treating every rural destination as the same kind of countryside.
The full story
The northern third of Serbia lies largely within the Pannonian Plain, including much of Vojvodina and Mačva. Central Serbia becomes hillier, with Šumadija at its heart and river valleys cutting through the terrain. Mountains dominate farther south. This gradual change helps explain why journeys across the country pass through markedly different landscapes. In the east, the Carpathian and Balkan mountain systems shape the relief. Midžor rises in the Balkan Mountains, while the low Danube country around Prahovo presents a very different setting. The contrast between river plain and high ground is more useful for planning than a single national description of the climate. Most rivers ultimately drain towards the Black Sea through the Danube. The Sava, Tisza and Great Morava are part of that network; the Pčinja, flowing towards the Aegean, is an exception. Northern winters are cold and summers can be hot and humid. Mountain areas have colder winters and substantial snowfall, so conditions at altitude can differ sharply from those in the lowlands.