The Open Guide to London: the free London guide

Historic Buildings

• Big Ben and the Houses of Parliament
• [Tower of London]? / Tower Bridge
• Buckingham Palace
• [St. Paul's Cathedral]?
• The Monument
• [Historic Ships]? (not technically buildings :) including the HMS Belfast, the [Golden Hind]? and the Cutty Sark
• Battersea Power Station

Museums, Galleries, Arts Centres

• Science Museum
• Natural History Museum
• Victoria and Albert Museum
• London Transport Museum
• [National Maritime Museum]? (also Greenwich)
• Tate Modern and Tate Britain
• National Gallery and National Portrait Gallery
• [Royal Academy]?
• Museum of London
• South Bank Centre
• British Museum

Plazas and Junctions

• Trafalgar Square
• Piccadilly Circus
• Leicester Square
• [Covent Garden Plaza]?

Fun / Entertainment

• London Zoo
• London Eye
• [Madame Tussaud's]? / [Planetarium]?
• London Aquarium
• London Dungeon
• [Trocadero]?
• Parks: Hyde Park, Regent's Park, [St. James's Park]?
• BFI London IMAX Cinema
• Duck Tour

What else...?