The river that flows through Paris is the Seine. This iconic river runs approximately 777 kilometers (483 miles), serving as a central feature of the city. The Seine is lined with historic landmarks, including the Eiffel Tower, Notre-Dame Cathedral, and numerous bridges, contributing to the city's charm and romantic atmosphere. A popular activity for both locals and tourists is to take a scenic boat cruise along the Seine, offering breathtaking views of iconic Parisian architecture and the vibrant life along the riverbanks.