One of the best things about river cruising in Europe is that it takes you into the heart of world-famous cities, charming smaller towns, and even through the countryside that you might not see any other way.  One of the best things about Avalon Waterways' Active shore excursions is that they give you yet another way to explore Europe's best scenery up close – on a bicycle, on foot, by kayak and more.Active shore excursions are one of three styles of...