London is the capital city of both England and the United Kingdom.
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London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism, and transport all contributing to its prominence.
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 of Greenwich (in which the Royal Observatory, Greenwich marks the Prime Meridian, 0 longitude, and GMT).
London is a popular centre for tourism, one of its prime industries, employing the equivalent of 350,000 full-time workers in 2003, while annual expenditure by tourists is around $15 billion. London attracts over 14 million international visitors per year, making it Europe's most visited city. London attracts 27 million overnight-stay visitors every year. In 2010 the ten most-visited attractions in London were:
* British Museum
* Tate Modern
* National Gallery
* Natural History Museum
* Imperial War Museum
* Science Museum
* Victoria and Albert Museumv
* Madame Tussauds
* National Maritime Museum
* Tower of London
London's first and only cable car, known as the Emirates Air Line, opened in June 2012. Crossing the River Thames, linking Greenwich Peninsula and the Royal Docks in the east of the city, the cable car is integrated with London's Oyster Card ticketing system.