The ADIGE, Tiber, ARNO, Nera, and Reno are all rivers in Italy. The ADIGE is the second longest river in Italy, stretching for over 350 miles from the Alps to the Adriatic Sea. The Tiber is the third longest river in Italy, flowing through Rome and into the Tyrrhenian Sea. The ARNO is a river in central Italy that flows through Florence and empties into the Ligurian Sea. The Nera is a river in central Italy that flows through Umbria and empties into the Adriatic Sea. The Reno is a river in northern Italy that flows through Bologna and empties into the Adriatic Sea.