the top entrance to the cave was found below the eastern palais destroyed in 1840. Below the castle is a mill named Klusenstein mill, though it did not belong to the castle. Since 1912 the railway connecting Balve and Menden runs directly below the castle. References 650 Jahre Burg Klusenstein. Heimatbund Märkischer Kreis. Buildings and structures completed in 1353 Castles in North Rhine-Westphalia Hill castles Buildings and structures in Märkischer Kreis County of Mark Hemer