The Tiber is the third-longest river in Italy, stretching about 405 kilometers (252 miles). It flows through the city of Rome before emptying into the Tyrrhenian Sea. The river has played a crucial role in the history and development of Rome, serving as a vital waterway for trade and transportation. Historically, the Tiber was important for agriculture and commerce, providing water to the surrounding regions. The river is also known for its picturesque landscapes and several iconic bridges, such as the Ponte Sant'Angelo and Ponte Milvio, which connect various parts of Rome.