In May, I got to go on an incredible Viking River cruise through the Rhein valley with my dad. The seven day cruise traveled through four countries and between the excursions and our tour guides, we really had an opportunity to get a great feel for each city. Day 1: We started in Basel, Switzerland where we only had a few hours to explore the city. The jetlag was pretty brutal, as we hadn't slept much on the plane, but it didn't stop us from getting our fill of gelato and tak