Destination Danube: Hungary National Day & Scenic Wachau Valley

One of the most beautiful cities in the world, the wonders of Budapest rise up along both banks of the Danube in a truly impressive way. Along with Heroes' Square with its Tomb of the Unknown Soldier, awe-inspiring Hungarian Parliament Building, and the lavish Castle District with photogenic Fishermen's Bastion, the city is home to a captivating Jewish district and the second-largest synagogue in the world, an intricate underground cave system, and some of Europe's most famous thermal baths.

Capital of Hungary from the 10th to mid-13th centuries, the royal city of Esztergom is where St. Stephen, Hungary's first king, was crowned. Esztergom Basilica, the country's largest church and seat of the Catholic Church in Hungary, houses the nation's largest ecclesiastical collection, while Esztergom Castle sits majestically on a cliff overlooking the Danube. Meanwhile, the city's medieval center is walled by Baroque, Rococo, and Neoclassical buildings and features a lively market square whose houses were occuped by rich merchants in the 17th century.

Bratislava is perfect for those who want to be transported to another time. Even from a distance, its 9th-century clifftop castle strikes an impressive pose. Down below, the bustling pedestrian-only Old Town is a charming collection of Old World architecture, like Michael's Gate, St. Martin's Cathedral, the Old Opera House, and the Neoclassical Primate's Palace. There's even a surprise or two, with Napoleon's cannonballs lodged in historic walls and an unexpected statue of Cumil the Sewer Worker peering up from below street level!

Vienna is a city that defies simple description. Over the centuries, it has been an imperial city, seat of the Holy Roman Empire, capital of the Austro-Hungarian Empire, and capital of sovereign Austria. Today, Vienna retains the grand Baroque architecture, historic style, and Lebenskunst (art of living) that attracted famous composers like Mozart and Strauss. It's a wonderland of lavish palaces and cathedrals, world-class museums and music venues, atmospheric coffee houses, and romantic fiakers (horse-drawn carriages) clip-clopping past it all.

If ever a town was the embodiment of quaint, it's Dürnstein. Sitting right at the entrance to the celebrated Wachau Valley, everything about this village is hospitable—even the vineyards extend right to the riverbanks to greet visitors. Highlights include the striking blue and white Stiftskirche, and the castle ruin looming over town that once imprisoned King Richard the Lionheart, according to legends. Welcoming shops and wine taverns serving up the Wachau's delectable wines and sweet apricots make this a wonderful place to spend time.

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Austria’s third largest city, Linz is a European Capital of Culture worth exploring. Highlights include the Feichtinger House with its Glockenspiel, Castle Museum, Lentos Art Museum, and the Neo-Gothic Mariendom with its impressive stained-glass windows and 20,000-person seating capacity. A hike up Pöstlingberg Hill delivers outstanding views over the Danube and is best followed by a coffee and piece of scrumptious Linzer Torte, invented here as the world's first cake!

Situated along the Route of Emperors and Kings where the Danube, Inn, and Ilz Rivers meet, Passau was settled as early as the Neolithic Age. During the Renaissance, this City of Three Rivers was a major manufacturing center of swords, crafting bladed weapons stamped with the Passau wolf, which legend claimed would grant invulnerability. Today, the most famous sights lining the narrow cobblestone streets of the Old Town are the artistic Town Hall and the Baroque St. Stephen's Cathedral with its green-domed towers and one of the largest organs in the world.