Valls is the birthplace of human tower building ands boasts more than 200 years of tradition. Tare are three colles, one teams, in the comarca: the Vella dels Xiquets and the Joves dels Xiquets, both from Valls, and the Xiquets de la vila d'Alcover. There are two absolutely essential dates on the Valls human-tower-building agenda: Sant Joan, on June 24 th and Santa Úrsula on the third Sunday in October.