Germany is famously home to an incredible density of historic fortifications, with estimates generally placing the number of castles between 20,000 and 25,000. This vast range exists because the definition of a "castle" can vary, including everything from the classic medieval Burg (fortress) to the later, more palatial Schloss (manor house or palace). Many of these structures, such as the world-renowned Neuschwanstein—the inspiration for Disney's iconic castles—or the exceptionally well-preserved Burg Eltz, are open to the public as museums or hotels. However, thousands of others exist as atmospheric ruins scattered across the German countryside, particularly along the Rhine and Moselle rivers. In 2026, many of these sites remain under the ownership of noble families who have inhabited them for centuries, while others serve as vital cultural centers, wedding venues, and UNESCO World Heritage sites, standing as silent witnesses to over a millennium of European history.