The River Liffey is a major river in Dublin, Ireland, flowing through the city and into the Irish Sea. It stretches approximately 125 kilometers (78 miles) and is known for its central role in the city's geography and history. The river is lined with several iconic bridges, including the Ha'penny Bridge and the O'Connell Bridge, which connect the north and south sides of Dublin. The Liffey has been an important waterway since ancient times, serving as a trade route and a source of water for the city. It is also a popular spot for recreational activities, such as kayaking and walking along its banks. The river's waters are home to various wildlife, contributing to the ecological diversity of the area.