Disclosure: This post contains affiliate links. If you purchase through these links, I may earn a small commission at no additional cost to you. When I packed for my Viking River Cruise through Eastern Europe, a bathing suit almost didn’t make it into my suitcase. River cruises are not exactly beach vacations. Most packing lists focus on comfortable walking shoes, layers for changing weather, rain gear, and excursion essentials. A swimsuit felt like one of those “just in case” items that would probably take up space and never get used. I’m glad I packed it anyway. One of the unexpected highlights of my trip was experiencing the famous Budapest thermal…