Sail through the spectacular Wachau Valley to Vienna, where you'll find the elegant buildings and streets festooned with decorations and strung with festive lights. After a day and a half in the Austrian capital, perhaps spent exploring the Christmas markets of Spittelburg and on the Freyung, you'll head to cosmopolitan Linz. You'll spend the final afternoon and evening of your cruise here, giving you the chance to sample a slice or two of the city's namesake delicacy, the sweetly nutty and fruity Linzertorte, before beginning the final leg of your festive cruise.