High Quality Content by WIKIPEDIA articles! Wacken is a municipality near the city of Itzehoe in Schleswig-Holstein, Germany. Wacken was first mentioned in 1148, but there were probably some settlements before, which is proven by the trove of Germanic artifacts. Today Wacken is famous for annually staging the world's biggest open air metal festival, "Wacken Open Air".Itzehoe is a town in Germany, in the Bundesland of Schleswig-Holstein, the capital of the district of Steinburg.It is located on the Stör, a navigable tributary of the Elbe, 51 km northwest of Hamburg and 24 km north of Glückstadt. The population is about 34,900.