When did Belgium leave the Netherlands ?
Arrow Rock Festival ( Biddinghuizen , Netherlands ) Dour Festival ( Dour , Belgium ) Dynamo Open Air ( Eindhoven , Netherlands ) Graspop Metal Meeting ( Dessel , Belgium ) Groezrock ( Gestel , Belgium ) Lowlands ( Biddinghuizen , Netherlands ) Parkpop ( The Hague , Netherlands ) Pinkpop Festival ( Landgraaf , Netherlands ) Pukkelpop ( Kiewit , Belgium ) Rock Werchter ( Werchter , Belgium )