and one of the largest and busiest cities in the world. Other cities, mainly in central and northern England, are of substantial size and influence. The list of England's largest cities or urban areas is open to debate because, although the normal meaning of city is "a continuously built-up urban area", this can be hard to define, particularly because administrative areas in England often do not correspond with the limits of urban development, and many towns and cities have, over the centuries, grown to form complex urban agglomerations. For the official definition of a UK (and therefore English) city, see City status in the United Kingdom. According to the ONS urban area populations for continuous built-up areas, these are the 15 largest conurbations (population figures from the 2001 census): The largest cities in England are as follows (in alphabetical order): Birmingham Bradford Bristol Coventry Derby Kingston upon Hull Leeds Leicester Liverpool London Manchester Newcastle upon Tyne Norwich Nottingham Oxford Peterborough Plymouth Portsmouth Sheffield Southampton Stoke-on-Trent Wolverhampton York Physical geography Extreme points The extreme points of England are: England (mainland) Northernmost point – Marshall Meadows Bay, Northumberland at Northernmost settlement – Marshall Meadows, Northumberland at Southernmost point – Lizard Point, Cornwall at Southernmost settlement – Lizard, Cornwall at Westernmost point – Land's End, Cornwall at Westernmost settlement – Sennen Cove, Cornwall at Easternmost point – Lowestoft Ness, Suffolk at Easternmost settlement – Lowestoft, Suffolk at England (including islands) Northernmost point – Marshall Meadows Bay, Northumberland at Northernmost settlement – Marshall Meadows, Northumberland at Southernmost point – Western Rocks, Isles of Scilly at Southernmost settlement – St Agnes, Isles of Scilly at Westernmost point – Crim Rocks, Isles of Scilly at Westernmost settlement – St Agnes, Isles of Scilly at Easternmost point – Lowestoft Ness, Suffolk at Easternmost settlement – Lowestoft, Suffolk at Topography, mountains and hills England is generally lower and flatter than the rest of the UK, but has two main divisions in its form – the lowland areas of the south, east, and midlands and the more rugged and upland areas of the north and west. East Anglia is the lowest area of England, having no high hills or mountains and hosting an area of the Fens, the lowest area of England. The highest area of England is the North West, which contains England's highest hills and mountains, including its highest – Scafell Pike. In England, a mountain is