Eyneburg, located in Kelmis and overlooking the Göhl valley, is a medieval castle built in the 13th century and progressively expanded over subsequent centuries. One of the few castles of the Duchy of Limburg situated on elevated terrain, it displays distinctive visual appeal through its eclectic combination of rooflines and architectural elements from multiple periods. The castle's name derives from the family that owned it starting in the 1300s, though medieval legend associated it with Emma, daughter of Charlemagne. Today, the castle operates with administrative services available by appointment, reflecting its historical significance as a showcase of layered medieval and later architectural styles.