The northern part of the British Isles, Scotland has been since 1707 part of the United Kingdom of Great Britain. Separated from England by the River Tweed, the Cheviot Hills, the River Liddell and Solway Firth, it is bounded on the north and west by the Atlantic Ocean and on the east by the North Sea. Scotland is comprised of three main geographical regions. The Southern Uplands is a region comprising high rolling moorland cut by narrow flat valleys. The central Lowlands is made up of plains and valleys varied by a series of hills and includes the country's major commercial and industrial areas and its best arable land. They are separated by the Grampian mountains from the Highlands of the north, a much eroded area of mountains separated by valleys and containing Britain's highest peak, Ben Nevis, at 4406 feet. Ruskin 's father, John James Ruskin, was born in the capital, Edinburgh, in 1785. See also Ruskin and Scotland.