The river that flows through the city of Budapest is the Danube River. This river is the second-longest in Europe and serves as a vital waterway for trade and transportation. It runs through several countries and is renowned for its historical significance and picturesque views, particularly as it passes through the heart of Budapest, dividing the city into two parts: Buda and Pest. The Danube is also celebrated for its cultural and recreational significance, with riverside parks, promenades, and ferries enhancing the vibrant urban life of the city.