See Bucharest’s 1,100-room Palace of Parliament. Join a home cook in Vidin to prepare banitsa, a feta filo pastry. Explore Belgrade’s Ottoman and European treasures, including the 6th-century Kalemegdan Fortress. View the Danube’s towering Iron Gate, witness Hungary’s daredevil Puszta horsemen and behold Budapest’s grandeur. As you sail, discover the secrets of the eastern Danube that were once hidden behind the Iron Curtain.