Stretching for more than thirty miles at its broadest point, London is by far the largest city in Europe. The majority of its sights are situated to the north of the River Thames, which loops through the city from west to east. However, there is no single predominant focus of interest, for London has grown not through centralized planning but by a process of agglomeration - villages and urban developments that once surrounded the core are now lost within the amorphous mass of Greater London.

One of the few areas that you can easily explore on foot is Westminster and Whitehall , the city's royal, political and ecclesiastical power base, where you'll find the National Gallery and a host of other London landmarks, from Buckingham Palace to Westminster Abbey and Big Ben. The grand streets and squares of St James's , Mayfair and Marylebone , to the north of Westminster, have been the playground of the rich since the Restoration, and now contain the city's busiest shopping zones.

East of Piccadilly Circus, Soho and Covent Garden are also easy to walk around and form the heart of the West End entertainment district, containing the largest concentration of theatres, cinemas, clubs, flashy shops, cafés and restaurants. To the north lies the university quarter of Bloomsbury , home to the ever-popular British Museum, and the secluded quadrangles of Holborn's Inns of Court, London's legal heartland.

The City - the City of London, to give it its full title - is at one and the same time the most ancient and the most modern part of London. Settled since Roman times, it is now one of the world's great financial centres, yet retains its share of historic sights, notably the Tower of London and a fine cache of Wren churches that includes St Paul's Cathedral. Despite creeping trendification, the East End , to the east of the City, is not conventional tourist territory, but to ignore it entirely is to miss out a crucial element of contemporary London. Docklands is the converse of the down-at-heel East End, with the Canary Wharf tower, the country's tallest building, epitomizing the pretensions of the Thatcherite dream.

Lambeth and Southwark comprise the small slice of central London that lies south of the Thames. The South Bank Centre, London's little-loved concrete culture bunker, is enjoying a new lease of life thanks to its proximity to the new Tate Gallery of Modern Art in Bankside, which is linked to the City by a new pedestrian bridge.

The largest segment of greenery in central London is Hyde Park, which separates wealthy Kensington and Chelsea from the city centre. The museums of South Kensington - the Victoria & Albert Museum, the Science Museum and the Natural History Museum - are a must; and if you have shopping on your agenda, you'll want to check out the hive of plush stores in the vicinity of Harrods.

The capital's most hectic weekend market takes place around Camden Lock in North London . Further out, in the literary suburbs of Hampstead and Highgate, there are unbeatable views across the city from half-wild Hampstead Heath, the favourite parkland of thousands of Londoners. The glory of South London is Greenwich, with its nautical associations, royal park and observatory (not to mention its Dome). Finally, there are plenty of rewarding day-trips along the Thames from Chiswick to Windsor , most notably Hampton Court Palace and Windsor Castle.