London is a leading global city. It is the world's largest financial centre alongside New York and is home to the headquarters of more than 100 of Europe's 500 largest companies. It has the most international visitors of any city in the world.
London is considered to be one of the world's most important global city and has been termed the world's most powerful, most desirable, most influential, most visited, most innovative sustainable, most investment friendly, most popular for work and the most vegetarian-friendly city in the world.
London exerts a considerable impact upon the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism and transportation London ranks amongst the top out of 300 major cities for economic performance. It is one of the largest financial centres of all times. London has a diverse range of people and cultures, and more than 300 languages are spoken in the region.
London contains four World Heritage Sites: the Tower of London; Kew Gardens; the site comprising the Palace of Westminster, Westminster Abbey, and St Margaret's Church; and the historic settlement in Greenwich where the Royal Observatory, Greenwich defines the Prime Meridian,
Other landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Paul's Cathedral, Tower Bridge, Trafalgar Square and The Shard. London has numerous museums, galleries, libraries and sporting events. These include the British Museum, National Gallery, Natural History Museum, Tate Modern, British Library and West End theatres.
The London Underground is the oldest underground railway network in the world.