1) - Half-day guided tour round the West End and the City - Changing of the Guard at Buckingham Palace - photograph the Houses of Parliament from across the Thames - cross over Tower Bridge, the famous London landmark. In the afternoon visit the Tower of London and Tower Bridge.
2) - St Paul's Cathedral for views over London - Madame Tussaud's waxworks - shopping in the West End.
3) - Walking tour round central London - Mounting the Guard in Whitehall - picnic in St James' Park - boat from Westminster Pier to Greenwich - Royal Observatory and the Maritime Museum devoted to the history of Britain and the sea.
4) - Dinosaurs, reptiles, human biology, insects and much more at the exciting Natural History Museum - street performers and inexpensive stalls in Covent Garden - Trafalgar Square and Leicester Square.
5) - Hampton Court, the magnificent Tudor palace of Henry III - Windsor Castle, the home of the Royal family - Eton College, the best known school in the world.
6) - South Bank Walk from Lambeth Bridge opposite the House of Commons to Tower Bridge - London Eye for great views over the city - Golden Hinde, the pirate ship which circumnavigated the world in 1577-80 - Imax cinema , the biggest 3-D screens in the world - giant 3-storey tanks in the London Aquarium containing fish from the Atlantic and the Pacific - Tate Gallery of Modern Art - the millennium bridge to St Paul's - London Dungeon featuring torture and plague in medieval London - HMS Belfast, the World War II cruiser.
7) - Hyde Park, a green lung in the heart of London - the over-the-top glitzy Albert Memorial - the wonders of discovery in the Science Museum - Harrods, the world's most famous store.
If you're staying more than six days in London why not take a day trip to visit one of the following groups of attractions.
Portsmouth - HMS Victory, Nelson's flagship and the most impressive survivor from the great days of wooden ships. Portchester Castle, the largest surviving Roman fort in Western Europe.
Brighton the liveliest resort on the south coast and very popular with teenage groups.
Oxford - there are over 650 buildings in Oxford listed as being of historic or architectural merit. Countless American Rhodes scholars have experienced the fascination of its 600 year history as a seat of learning.
Canterbury - Norman ramparts still surround much of the medieval city. Inside the walls stands Canterbury Cathedral, the most complete Norman church in England.
Cambridge - the finest example of a medieval city in England, crowned by the magnificent Kings College Chapel. Punting along the Cam adds to its special charm.