LUDWIGSHAFEN, GERMANY – RÜDESHEIM. Ludwigshafen is your gateway to a choice of three excursions. Visit Heidelberg, the perfectly preserved medieval city nestled in the Neckar River Valley along Germany’s Castle Road. Discover the iconic red sandstone Heidelberg Castle and Great Vat, an 18th-century 49,000-gallon wine cask. For a more active adventure while in Heidelberg, join a guided hike up the Philosopher's Path, aptly named during the Romantic Period, and be rewarded with panoramic views of the city. Alternatively, you can visit one of Germany’s oldest cities, Speyer, known for the largest Romanesque cathedral in Europe—a UNESCO World Heritage Site—and the medieval Altpörtel, Old Gate. Later in the day, sail to Rüdesheim where you can visit Siegfried’s Mechanical Instrument Cabinet; or taste one of the town’s special delights, Rüdesheimer Coffee, ceremoniously made with brandy. (B,L,D)