Board your ship in Luxembourg for your Europe’s Rivers & Castles cruise. (B,D)

Trier is Germany’s oldest city, renowned for its rich ancient Roman past, and referred to as the “Rome of the North” or “Second Rome” as it has impressive Roman relics and nine UNESCO World Heritage Sites. Join a guided tour of the city, including the old Roman amphitheater, Roman Baths and Basilica of Constantine. Alternatively, go in search of the secrets of the Porta Nigra Gate, dating back to 180 A.D., on a tour that takes you back to a time when Rome ruled the world from the Emperor’s seat in Trier. You also have the choice of a hike high above Trier to Petrisberg. Later in the day, sail to Bernkastel.

Walk through its colorful Old Town center and past many medieval and Renaissance buildings on a guided tour that also includes a winery visit and tasting. Those seeking an active adventure can opt to trek up to the ruins of Landshut Castle, which dates all the way back to the 9th century. (B,L,D)

Head to fairytale Cochem and visit the Reichsburg Castle followed by a walking tour. Or, enjoy a guided walking tour of Koblenz, a historic town located at the northern end of the Rhine Gorge where you will visit the town’s famous Clock Tower. Later in the day, set sail for Rüdesheim, where you can visit Siegfried’s Mechanical Musical Instrument Museum, or enjoy the town’s iconic Rüdesheimer coffee, served ceremoniously with whipped cream and brandy. (B,L,D)

Drink up the stunning views by soaring high above the vineyards with a gondola ride to the Niederwalddenkmal Statue or allow yourself to be treated to a wine tasting. For a more active adventure, hike through the town’s beautiful vineyards above the Rhine River. As an alternative, head to the confluence of the Rhine and Main Rivers to Mainz, where you’ll enjoy a walking tour of its Old Town, brimming with quaint narrow streets, Baroque churches and halftimbered houses. You’ll also have a chance to visit the Collegiate Church of St. Stephan, best known for its blue Chagall windows. (B,L,D)

Wertheim’s old town center still features halftimbered houses and the Gothic architecture of the Stiftskirche, its oldest Protestant church. You may either join a guided walking tour through the historic city center or learn the art of pretzel making with a visit to a local bakery. For those seeking a more active adventure, take a scenic bike ride through the Main River Valley or hike high above the town for a visit to the castle, one of the most picturesque ruins in Germany.(B,L,D)

Enjoy a city tour of Würzburg, bursting with Baroque splendor. Or visit Würzburg’s Baroque Residenz Palace, a UNESCO World Heritage Site that features an opulent interior, including a grand fresco by Tiepolo. Or stretch your legs while hiking to Würzburg Castle. Alternately, go on a fullday excursion to Rothenburg, Germany’s bestpreserved walled town located on the Romantic Road. (B,L,D)

Head to Bamberg, which has been referred to as “Franconian Rome” as, like Rome, it was built on seven hills—but in Bamberg, a church graces each one. Bamberg’s medieval and Baroque architecture has withstood the test of time and, as such, became a UNESCO World Heritage Site. Join a guided walking tour of this medieval gem where you’ll see its cathedral, Old Town Hall and elegant old mansions, and afterwards, indulge in the town’s famous smoked beer, Rauchbier. Or, indulge in the culinary specialties of Bamberg, including licorice root, Horla pastries, traditional German sausage and smoked beer. As a more invigorating alternative, pedal from Eltmann to Bamberg, meeting the ship there later in the day. (B,L,D)

Bid farewell to the ship in Nuremberg as you prepare for your return flight home. (B)