The riverside town of Silistra, situated in northeastern Bulgaria, was once the Roman settlement of Durostorum, a heritage you can explore at the interesting Archaeological Museum. You can also visit the town’s Ottoman era fort or take a trip out into the surrounding countryside.

The Bulgarian city of Ruse (also written ‘Rousse’) sits on the right bank of the Danube just opposite the Romanian city of Giurgiu, and is one of the country’s most attractive cities. Sometimes known as ‘Little Vienna’, thanks to the plethora of Neo-Baroque and Neo-Rococo architecture, it’s a highlight of any cruise along this stretch of the Danube.

As the Danube wends its way east, along the border between Serbia and Romania, the river narrows to a dramatic gorge known as the Iron Gates. The river here is flanked by a huge stone carving of Decebalus, the last king of the Dacians and a Romanian national hero.

Belgrade has been invaded and occupied dozens of times over the centuries, a fact that's reflected in the mish-mash of architectural styles, from Ottoman and Art Nouveau to grim relics of the communist era. But Belgrade is also a city with real soul, emerging from a difficult recent history as one of Europe’s most exciting capitals.

Osijek is the capital of Slavonia, a region of eastern Croatia that is hemmed in on three sides by Hungary, Serbia and Bosnia. Tourists are thin on the ground compared to the Dalmatian Coast, yet Osijek is an elegant and cosmopolitan city surrounded by beautiful countryside.