Pfalzgrafenstein is a captivating small island in the Rhine River near Kaub, Germany, renowned for its unique castle that resembles a ship. This historical site offers visitors a chance to explore its well-preserved medieval architecture and immerse themselves in the rich history of the region. Tourists can enjoy guided tours of the castle, which served as a toll station in the past, and take in the stunning panoramic views of the Rhine Valley. Nearby, the charming town of Kaub invites exploration with its quaint streets and local cuisine, providing a perfect complement to the island's historic allure.