For a long time, according to popular tradition, an underground Labyrinth located beneath Chiusi was part of Porsenna’s burial place. Actually, these tunnels are part of an ancient acqueduct comprised of underground corridors of various sizes and depths. The dead ends present, are due to the methods used by the Etruscans for the construction. They used to dig only into the conglomerate ground that could filter water. If the soil was not permiabile the tunnel was interrupted and a new tunnel excavated.
The itinerary through the Labyrinth of Porsenna begins in the Museo della Cattedrale, in Piazza Duomo, and ends after 130 m at the great Etruscan-Roman cistern that dates back to the 1st century B.C.
From the cistern, visitors take the stairs to the base of the tower, built in the 12th century. From the top of the tower, the picturesque rooftops of the historic centre, the medieval fortress, the “Beccati questo” and “Beccati quello” towers, and the lakes of Chiusi and Montepulciano make for a beautiful view.