A group of inventors, designers, architects and game changers are moving forward with the idea of establishing the world's first underground park in New York City.
Co-founders James Ramsey and Dan Barasch want to find a way of making cities greener, more liveable and more beautiful, even when they're running short on space.
They came up with the plausible solution that new solar technology could be used to reflect and direct light underground, allowing the plants and trees to live, grow and prosper.
The space they have in mind is the former Williamsburg Bridge Trolley Terminal, which between 1908 and 1948 was used as a base for trams to carry passengers over the bridge that it takes its name from.
Since then, the underground area the size of a football field has remained untouched. With a significant portion of its original features effectively preserved - including cobblestones, rail lines and overhead catenaries - the terminal lies below New York's Lower East Side neighbourhood, which like much of the city is in major need of more green space.
