The major river that flows through London is the River Thames. It is one of the most famous rivers in the world, stretching approximately 215 miles (346 kilometers) from its source in Gloucestershire to the North Sea. The River Thames has played a significant role in England's history, serving as a vital transportation route for trade and commerce. In London, it runs through many iconic locations and landmarks, including the Tower of London, the Houses of Parliament, and the London Eye. The river also supports a diverse ecosystem and is an essential part of the city's cultural and social life.