Burg Obervoitsberg crowns a hilltop north of Voitsberg with dramatic ruins dating primarily to the 14th and 15th centuries, though the original fortress was built around 1164. The castle has been transformatively reimagined as an open-air theater featuring a multilevel stage set against romantic ruins, offering breathtaking views over the city and countryside. The Burghofspiele Voitsberg presents traditional theatrical performances and musical concerts during summer months, making this historic venue a dynamic cultural destination.