Wacken Open Air is an annual heavy metal music festival held in Wacken, Germany. Established in 1990, it has grown to become one of the largest and most famous metal festivals in the world, attracting fans from various countries. The event typically features a diverse lineup of both established and emerging metal bands across multiple stages. The festival usually takes place in early August and spans over four days. In addition to live performances, Wacken Open Air offers various activities, including merchandise stalls, food vendors, and camping options for attendees. The festival is known for its vibrant atmosphere and strong sense of community among metal fans.