ch the Royal Observatory, Greenwich marks the
Prime Meridian, 0° longitude, and GMT). Other famous landmarks include
Buckingham Palace, the London Eye, Piccadilly Circus, St Paul's Cathedral,
Tower Bridge, Trafalgar Square, and The Shard. London is home to numerous
museums, galleries, libraries, sporting events and other cultural institutions,
including the British Museum, National Gallery, Tate Modern, British Library
and 40 West End theatres. The London Underground is the oldest underground
railway network in the world
