Plymouth is a city in Devon, and the largest city on England's south coast, with a population of 250,000. It is about 190 miles (310 km) south-west of London, where the River Plym and the River Tamar (pronounced "TAY-mar") flow into the large bay of Plymouth Sound, creating a perfect natural harbour. The sea has been at the heart of Plymouth since it was founded in the middle-ages as a trading post and the source of its prosperity. Plymouth was the point from which the Pilgrim Fathers left England in 1620 for Massachusetts - commemorated today in the Mayflower Steps.
Plymouth is one of England's classic ocean cities, and for centuries has been a centre for shipping; first for trade and commercial shipping, and today as a base for the Royal Navy. Indeed, the city's Devonport Dockyard is the most extensive naval base in western Europe. The water, with its leisure activities, brings many tourists to Plymouth, as well as its various museums and other tourist attractions. In addition its location close to Dartmoor and other sights of south Devon to the east and Cornwall to the west make it an excellent base for a trip to the south-west of England.