Oxfordshire includes parts of three Areas of Outstanding Natural Beauty. In the north-west lie the Cotswolds, to the south and south-east are the open chalk hills of the North Wessex Downs and wooded hills of the Chilterns. The north of the county contains the ironstone of the Cherwell uplands. Long-distance walks within the county include the Ridgeway National Trail, Macmillan Way, Oxfordshire Way and the D'Arcy Dalton Way.