Step aboard MS River Discovery II for a Danube cruise along the eastern stretches of the river towards the Black Sea. Together, we’ll tick off five fascinating countries: Hungary, Serbia, Bulgaria, Croatia and Romania, collecting historical titbits and cultural nuances as we go. Nature enthusiasts will relish an afternoon floating along the forested waterways of the Danube Delta. The bobbing reed islets, sandbars and chorus of croaking frogs will make the sparkling cities of Budapest, Belgrade and Rousse feel a world away.