Valdelsa or Val d'Elsa is the valley of the river Elsa, in Tuscany, central Italy. The valley is divided into two traditional regions: Alta Valdelsa ("Upper Valdelsa"), in the province of Siena, Poggibonsi being the largest town in the area; and Bassa Valdelsa, in the Metropolitan City of Florence, Empoli being the largest town (although technically the latter is in the Valdarno). Other centers in the valley include Castelfiorentino, Certaldo, Colle di Val d'Elsa and San Miniato. The economy is now mostly based on high quality, small-quantity agricultural productions, and tourism. Source: Wikipedia (en)