England comprises most of the central and southern two-thirds of the island of Great Britain, in addition to a number of small islands of which the largest is the Isle of Wight. Much of England consists of rolling hills and plains, with upland and mountainous terrain in the north and west. Uplands in the north include the Pennines, a chain of mountains dividing east and west, the Lake District, containing the highest mountains in the country, the Cheviot Hills and the North York Moors. Uplands in the west include Dartmoor and Exmoor in the south-west and the Shropshire Hills near Wales. To the south, there are larger areas of flatter land, including East Anglia and the Fens, although hilly areas include the Cotswolds, the Chilterns, and the North and South Downs.