Ruin of castle built in the 16th century on the remains of an even older (11th century?) castle, destroyed in 1689. Located at the very top you can get a great view of the town and the surrounding countryside. During summer the ruin is sometimes used for theatre performances. If you walk from the ruin past the Ruprechtsturm downstairs to the Clock Tower (Uhrturm, near the train station) you might notice a huge chunk of curved brickwork (to the left of a small viewing balcony). This is a piece of the castle's round main tower. Despite weighing several tons, it was hurled hundreds of meters when the tower was blown up in 1689.