Some of the counties have major subdivisions. Of these, the most significant are the divisions of Yorkshire: the East Riding, West Riding, North Riding and the ainsty of York. Since Yorkshire is so big, its ridings became established as geographical terms quite apart from their original role as administrative divisions. The second largest county, Lincolnshire, was divided into three historic "parts": Parts of Lindsey, Holland and Kesteven. Other divisions include the special status of Tower Hamlets within Middlesex, those of Sussex into East Sussex and West Sussex and Suffolk into East Suffolk and West Suffolk, and, more informally and hence more vaguely, of Kent into East Kent and West Kent.