The name of the river that runs through London is the River Thames. The Thames is the longest river in England, stretching approximately 215 miles from its source in the Cotswolds to the North Sea. It plays a significant role in London's geography, history, and culture, serving as a vital waterway for transportation and trade. Along its banks, one can find iconic landmarks, including the Tower Bridge, the Houses of Parliament, and the London Eye. The river itself also hosts various recreational activities and events, making it a vital aspect of London's urban life.