Bath and North East Somerset covers an area of 220 square miles (570 km²), of which two thirds is green belt. It stretches from the outskirts of Bristol, south into the Mendip Hills and east to the southern Cotswold Hills and Wiltshire border. The city of Bath is the principal settlement in the district, but BANES also covers Keynsham, Midsomer Norton, Radstock and the Chew Valley.