Hi Gustav, The center of Boppard is basically a pedestruan zone. It's not big but it's quite nice: you can find there cafes, wine shops (the specialty of the Rhine zone), bakeries and so on. Most of the shops are for locals, so you won't find there the standard souvenirs and touristic type shops. You can take a nice walk on the Rhine promenade, have linch or dinner at the restaurants scattered there. There is a museum called "Tonnet" at the end of the promendae. I didn't have the chance to see it, but it's another possible attraction.