It has an extensive [[North Sea]] coastline with many popular beaches. Principal towns and cities include [[Lincoln]], [[Gainsborough]], [[Skegness]], [[Boston]], and the birthplace of [[Margaret Thatcher]], [[Grantham]]. | It has an extensive [[North Sea]] coastline with many popular beaches. Principal towns and cities include [[Lincoln]], [[Gainsborough]], [[Skegness]], [[Boston]], and the birthplace of [[Margaret Thatcher]], [[Grantham]]. |