London is by far the UK's most visited city. It is a cultural and economic superpower which attracts tourists from all over the world. London has an abundance of choice, so let's narrow it down to 10 unmissable sites and attractions. As with all large, major tourist hubs, be sure to book in advance. Each attraction is served by a London Underground Station (In brackets). 10. National Gallery (Trafalgar Square) 9. The Shard (London Bridge) 8. London Eye (Waterloo) 7. Tate Modern (Blackfriars) 6. Victoria and Albert Museum (South Kensington) 5. Tower of London (Tower Hill) 4. Madame Tussauds (Baker Street) 3. British Museum (Tottenham Court Road) 2. Buckingham Palace (Green Park or St James' Park ) 1. Big Ben and Houses of Parliament (Westminster)