Built in the 12th century, Isenburg Castle once guarded the Mulde Valley near Sachsenburg in Saxony. The fortress fell into decline after the Thirty Years’ War, leaving only sections of its curtain wall and a single watchtower standing amid dense woodland. Local accounts describe sightings of a shadowed female figure along the outer ramparts and echoing footsteps from the collapsed great hall, said to belong to a noblewoman betrayed and murdered within the castle. Archaeological surveys in the 1990s uncovered hidden cellars and a sealed tunnel descending toward the river. Night hikers frequently report the sound of chains and faint torch-light movements across the lower ruins.