The Strait of Dover is a narrow body of water that separates southern England from northern France. It is approximately 21 miles (34 kilometers) wide at its narrowest point and serves as a key maritime route for ships traveling between the English Channel and the North Sea. The strait is known for its strong currents and busy shipping traffic. This strait is also famous for its historical significance, particularly during events like the Dunkirk evacuation in World War II. The white chalk cliffs of Dover, located on the English side, are a well-known landmark and symbolize the gateway to England from the continent.