The Euganean hills as well as for the production of wine are also famous for the extraction of trachyte. It was used in the Paleovenetian era for the construction of building works and in the Roman era for canal-building constructions. In the fifties it served to rebuild the banks of the river Po after the overflow especially in the province of Rovigo. This caused financial abuse because the trachyte was sold only on paper to the State without control in the quantities extracted, with consequent enrichment of the quarrymen. It is a hard, magmatic, siliceous stone with various colors. Brown with darker veins, gray-blue, gray, brown-blue, yellow-brown. Many palaces, squares, works of art of Padua, Venice, Vicenza, Treviso and not only are worked with this stone. This is a rock that lends itself to any type of work, from the work in facades and bush-hammered to those honed and polished. It is often approached to wood due to its resemblance. In ancient times it was claimed that the trachyte was a living stone because by cutting a boulder just detached from the wall inside it you can see a trickle of water. For centuries these quarries have given riches to our Venetian works of art by offering work to native stonemasons who extracted and worked the trachyte of the Euganean Hills and now are bound by the "Park" that introduced fauna that originally was not impoverishing ancient activities that can no longer survive despite possible resources for advanced ecological landscape redevelopment.