If you are in the netherlands around the 27th of june you should visit parkpop. Its in the Hague and not in amsterdam, so you might be the only tourists . Parkpop is a free popfestival in the zuiderpark with national and international (european) acts. It has twoo big open air stages and a smaller one. If you take your own food with you it will only cost you a train and a bus ticket. Just go to den haag central station and take the bus outside. Pray for good weather and enjoy good live music and a joint. Peace! www.parkpop.nl