Po (river) 70,000 in Italy, of which 41,000 is in montane environments and 29,000 on the plain. The Po is the longest river in Italy; at its widest point its width is . The Po extends along the 45th parallel north. The river flows through many important Italian cities, including Turin (Torino), Piacenza and Ferrara. 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
Sakarya River Sakarya River The Sakarya (, ) is the third longest river in Turkey. It runs through what in ancient times was known as Phrygia. The source of the river is the "Bayat Yaylası" (Bayat Plateau) which is located to the northeast of Afyon. Joined by the "Porsuk Çayı" (Porsuk Creek) close by the town of Polatlı, the river runs through the "Adapazarı Ovası" (Adapazarı Plains) before reaching the Black Sea. The Sakarya was once crossed by the Sangarius Bridge, constructed by the East Roman Emperor Justinian I (r. 527–565). In the Middle Ages, the valley of the Sakarya was the