Serbia

A striking natural monument in southern Serbia of 202 erosion pillars formed from volcanic andesite by two rivers and freeze-thaw cycles; protected since 1959 and designated a nature monument of exceptional importance.

Belgrade's ancient fortress above the Danube–Sava confluence, a layered palimpsest of Roman, Byzantine, Ottoman and Habsburg military architecture enclosing a much-loved public park.

An 18th-century Habsburg baroque citadel on a basalt plateau above the Danube in Novi Sad, one of Europe's best-preserved Vaubanesque military complexes, with 16 km of underground tunnels.

One of Europe's largest medieval fortifications, built by Đurađ Branković in 1430 as the new capital of the Serbian Despotate; a massive Danube-side fortress of Gothic and Byzantine engineering.

A 12th-century Serbian Orthodox monastery founded by Stefan Nemanja, celebrated for its Raška-school architecture and exceptional 1208–1209 fresco cycle; UNESCO World Heritage listed since 1986.

A forested mountain national park in western Serbia on the Bosnia border, centred on the Rača karst and the Drina River canyon; home to Europe's last primeval beech forests and the endemic Serbian spruce.