See top attractions and explore lesser-known areas of the city on London sightseeing tours. From bus tours in London to fact-filled walking tours, Thames river cruises and bike tours, sightseeing in London is full of possibilities. Choose a hop-on hop-off bus tour to explore at your own pace or book onto an afternoon tea bus tour for indulgent treats while you see the sights. For the ultimate in luxury, soar above the city with helicopter tours in London.