Serbia’s largest national park (636 sq km) is also one of its most dramatic, with arresting attractions both natural and human-made. The astounding Iron Gates gorge (Đerdapska klisura) is the park’s main draw; its formidable cliffs – some of which soar over 500m – dip and dive for 100km along the Danube to form a natural border with Romania. The medieval Golubac Fortress, the Mesolithic settlement of Lepenski Vir and the Roman-era Tabula Traiana (commemorating a bridge across the Danube) are testimony to old-time tenacity.
The park itself is home to plenty of critters, including bears, lynxes, wolves, eagles and owls. With marked paths and signposted viewpoints, Đerdap is an excellent hiking destination; the EuroVelo 6 cycling path runs through here.