A few kilometers from the Dutch border, in the Belgian Neerpelt, there is a unique outdoor sound art collection, one which has been in operation since 2005: Klankenbos. Hidden among the trees of the Provinciaal Domein Dommelhof, you can find sound installations in the most diverse shape and form. The collection ranges from vibrating boxes and ‘motorised trees’, to installations that are ‘played by the elements’, or objects that invite visitor to interact. In 2015, Musica has been celebrating the 10th birthday of the collection. Gonzo (circus) made a special about it in its September issue.