The river that flows through London is the River Thames. This iconic river is an essential waterway in England, stretching about 215 miles (346 kilometers) from its source in the Cotswolds to its mouth in the North Sea. The Thames passes through numerous towns and cities, with London being its most prominent urban area. The river has historically served as a vital trade route and has witnessed significant events in British history. Today, the River Thames is not only a key transportation artery but also a popular site for recreation, tourism, and cultural activities in London.