It goes through many important Italian towns, including Turin (Torino) and (indirectly) Milan (Milano), in Lombardy. It is connected to Milan through a net of channels called "navigli", which Leonardo da Vinci helped design. Near the end of its course, it creates a wide delta (with hundreds of small channels and five main ones, called "Po di Maestra", "Po della Pila", "Po delle Tolle", "Po di Gnocca" and "Po di Goro") at the southern part of which is Comacchio, an area famous for eels. The Po valley corresponds to the Roman Cisalpine Gaul, divided in Cispadane Gaul (South of the Po) and Transpadane Gaul (North of the Po).