Get ready for a unique experience at Pfalzgrafenstein, the striking ship-like castle sitting right in the middle of the Rhine. To reach this former toll station, you'll take a short, dedicated ferry ride from the charming town of Kaub, which is all part of the adventure. Once on the island, you're free to explore the castle's winding staircases and narrow passages at your own pace. It’s a fascinating glimpse into the past, and because it’s a historic site, be prepared for uneven surfaces and quite a few steps to get the best views from the top.