An Underground Park For NYC?

The BBC reports:

For New Yorkers frustrated by the lack of space the tradition has long been to build upwards - but the city renowned for its skyscrapers is now looking to exploit spaces underground too. The Low Line is a proposed subterranean park the size of a football pitch that would be created on the site of a former trolley terminal in Manhattan's Lower East Side. The century-old site has not been in use since 1948, yet its 18ft-high (5.5m) ceilings, rail tracks and cobblestones have been preserved largely intact. The name Low Line echoes the hugely popular High Line. That public park was created on disused sections of a raised railway track that snakes through downtown Manhattan. It attracts millions of visitors each year.

(Tipped by JMG reader Kevin)