A man plays guitar on a narrow boat on the Regent's Canal, near Camden Lock in north London March 20, 2012. The nine-mile (14.5 kilometre) Regent's Canal is one of the capital's best-kept secrets. Largely hidden behind buildings, the line sneaks its way through a rich collage of urban landscapes. Starting at the houseboats of Little Venice, it wends its way through Camden Lock and fashionable East London, and bypasses the site of London 2012 Olympic Games before ending in Limehouse Basin. Picture taken March 20, 2012. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT OLYMPICS TRAVEL) ATTENTION EDITORS - PICTURE 19 OF 36 FOR PICTURE PACKAGE 'DOWN THE REGENT'S CANAL'