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 theÂ 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.
The team behind the idea, Dan Barash and James Ramsey, would love to give residents an alternative place to escape the city's crowded streets. But how to get trees and grass to grow so far underground?
A system of solar panels and fibre optics would be used to bring light from above ground down to the terminal. They insist the technology has the potential to support photosynthesis.
The park plan is in its early stages. A Kickstarter campaign this month raised the first $150,000. Mr Barash admits the final cost is likely to be “many millions of dollars” and take several years.
Produced by Anna Bressanin; camera by Ilya Shnitser
via BBC News