A Christmastime River Cruise through Europe

[custom_headline type="center" level="h2" looks_like="h4" accent="true"] Days 1 and 2: Passau [/custom_headline] As I mentioned above, we began in Passau, Germany, which happens to be the home to Germany's oldest gingerbread recipe—Lebkuchen—a sweet confection baked only at Christmastime. With time to spare on our first day, we immediately made our way up the cobbled lanes to the…