Fascinating Vietnam, Cambodia & the Mekong River (Southbound)

The port of Prague is a vibrant gateway to Central Europe, renowned for its stunning architecture, rich history, and culinary delights. Must-do experiences include savoring traditional dishes like svíčková and exploring the charming streets of Český Krumlov. The best time to visit is during spring or early fall when the weather is pleasant and the city is alive with cultural festivals.

Regensburg, Bavaria's medieval masterpiece on the Danube, is one of Central Europe's most intact ancient cities — its Roman origins visible in the Porta Praetoria stone gate, its medieval prosperity celebrated in the soaring twin towers of St. Peter's Cathedral and the twelfth-century Stone Bridge. UNESCO World Heritage status acknowledges a skyline dotted with patrician towers, while the famous Historische Wurstküchl, Germany's oldest operating sausage kitchen, has been serving spit-grilled bratwurst since the 1140s. The surrounding hills produce excellent Bavarian whites. May through September offers the most convivial riverbank atmosphere.

Passau occupies one of Central Europe's most dramatic natural stages — a narrow peninsula at the confluence of three rivers, the Danube, Inn, and Ilz, where the old town's baroque spires and shuttered merchants' houses crowd the very tip of the land between the waters. St. Stephen's Cathedral houses the world's largest church organ, a 17,974-pipe instrument whose daily concerts fill the nave with a sound that seems architectural in its density. The Veste Oberhaus fortress above the city commands panoramic views across three countries on clear days. Passau is a classic Danube river cruise departure point; spring and early autumn, when the river runs high and the light turns golden, are the finest seasons.

Austria's third city has accomplished one of Europe's most convincing urban transformations — reinventing itself from industrial centre to cultural powerhouse, a journey recognised in 2009 when it was named European Capital of Culture. The Ars Electronica Center, a museum of digital art and technology that glows with LED light across the Danube each evening, epitomises Linz's forward-looking identity. Yet the city's Roman roots, its baroque Hauptplatz (one of Austria's finest main squares), and its proximity to the Wachau Valley anchor it firmly in history. The Upper Austrian cuisine — particularly Linzer Torte, the world's oldest-documented cake recipe — is exceptional. Linz is most agreeable May through September.

Krems an der Donau has stood at the eastern gateway of the Wachau Valley — Austria's most beautiful stretch of the Danube — since Emperor Otto III granted it market rights in 995 AD, making it one of the country's oldest documented towns. The UNESCO-listed Wachau landscape surrounding the city is a masterpiece of vineyard terraces, Baroque abbeys, and medieval castles reflected in the river; the Grüner Veltliner and Riesling wines produced here are among Austria's finest. Must-dos include visiting the monumental Melk Abbey and cycling the Danube Cycle Path through the valley. Krems is most enchanting April through October, with the harvest season in September offering wine cellar tastings of exceptional depth.

Phnom Penh rises from the confluence of the Mekong, Tonlé Sap, and Bassac rivers with a resilience that makes it one of Southeast Asia's most affecting capitals — a city that endured the Khmer Rouge's "Year Zero" and has re-emerged as a place of broad riverfront boulevards, excellent Khmer cuisine, and a cultural energy that feels earned rather than manufactured. The Royal Palace and its Silver Pagoda, housing a life-size gold Buddha studded with 9,584 diamonds, is the city's architectural centrepiece; the Tuol Sleng Genocide Museum, a former high school converted to a prison by the Khmer Rouge, is sobering but essential history. November through February offers the most comfortable climate for extended exploration.

The port of Vienna is a cultural gem along the Danube River, famous for its stunning architecture, rich history, and vibrant culinary scene. Must-do experiences include sampling authentic Wiener Schnitzel and visiting the picturesque village of Dürnstein. The best season to visit is spring or early fall, when the city's gardens bloom and outdoor activities abound.

Bratislava, the only national capital bordering two sovereign states, sits sixty kilometres downstream from Vienna on the Danube — close enough for a day trip to the Austrian capital, yet possessed of its own entirely distinct character: a pastel-hued medieval old town of hidden courtyards, playful bronze statues, and hilltop castle views, where wine bars pour outstanding Slovak Riesling at prices that make the Viennese feel extravagant. The city's dramatic reinvention since 1989 has produced a dynamic, youthful culture that fills the old quarter's restaurants and concert halls with genuine warmth. Pair with Vienna or Budapest for the classic Danube river trilogy; all three cities are within two hours of each other.