Taking a beat, a breath, and a moment to unwind is what travel is all about. And while this can be achieved on every vacation you take, it's always easier on a slow vacation, like the one you'd experience on a magical river cruise. This level of relaxation can really be found in riverways just about anywhere in the world — as long as you choose a winning cruise line like those on this year's World's Best Awards list. Our reader favorites service the waterways of Europe, South America, Asia, and beyond.