Montseny chestnuts Food and drink · Montseny, Vallès Oriental, Barcelona Image of Montseny, not of the place itself. The chestnut groves of the massif give one of the most characteristic forest products of the comarca, alongside mushrooms and aromatic plants. They are gathered in autumn, they sustain castanyades and village fairs and they feed a small local processing industry. Photo: Pere López (CC BY-SA 3.0) What to see and do in Montseny