Cardiff is bordered to the west by the rural district of the Vale of Glamorgan, also known as The Garden of Cardiff; to the east by the city of Newport; to the north by the South Wales Valleys; and to the south by the Severn Estuary and Bristol Channel. The River Taff winds through the centre of the city and together with the River Ely flows into the freshwater lake of Cardiff Bay. A third river, the Rhymney, flows through the east of the city directly into the Severn Estuary.