From the Pannonian plain and river lowlands to the Balkan and Carpathian mountain ranges, Serbia is a country of exquisite natural beauty. Undoubtedly one of its most impressive sights is the magnificent Iron Gates Gorge: a narrow valley that forms part of the border between Romania and Serbia. With dramatic 700-metre-high cliffs overhanging the river at some points, two of the most striking sections are Mali Kazan and Veliki Kazan. At 60 miles in length, it’s the biggest gorge in Europe, and our cruises offer spectacular views of this immense natural spectacle. Once through the Iron Gates the capital city of Belgrade is not far. Discover the city’s many interesting landmarks such as the Kalemegdan Fortress, and the tomb and monument of Marshal Tito, the former president of Yugoslavia. View the mighty structure that is St Sava Cathedral, renowned for being the largest church building in the Balkans.