New York's High Line: Why cities want parks in the sky (video)
By BBC News
Once an elevated freight railway track, New York's High Line is now an oasis for pedestrians. It has been so popular that other cities are following suit, with plans to replicate the formula in London. What is the secret of its success?
In 1980 the last freight train ran along the elevated railway line in the Lower West Side of Manhattan. Reportedly, it pulled three boxcars of frozen turkeys.
Learn more: http://www.bbc.co.uk
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