第聶伯 (Dnieper) is one of the major rivers in Europe, flowing through Ukraine, Belarus, and Russia. It is approximately 2,285 kilometers long, making it the fourth longest river on the continent. The river originates in the Valdai Hills of Russia and eventually empties into the Black Sea. The Dnieper has played a significant role in the history and economy of the regions it traverses. It serves as a vital waterway for transportation and trade, and its basin is home to various cities, including Kyiv and Dnipro. The river is also known for its scenic beauty and recreational opportunities.