The Danube, Europe’s second-longest river, flows from the Black Forest in the west to its mouth in the Black Sea to the east, serving as an exceptional gateway to the numerous countries it crosses. During your journey, anticipate visits to some of Europe’s must-see destinations such as Budapest, Vienna, and Bratislava, each offering unique historical architecture, vibrant bars, and delightful restaurants. When not immersing yourself in the sights of these European capitals, there’s ample opportunity to explore Austria’s renowned wine towns in the Wachau Valley, including Durnstein and Melk.