Nowadays, there is not even a trace of the old park.

When the High Line opened back in 2009, many hailed it as the first park of its kind in New York City. But did you know that another elevated park existed long before its West Side successor? The New York Times recently re-opened the case of the elevated playground, which was inaugurated 100 years ago on the Lower East Side but then vanished sometime after 1923 for an unknown reason. They’re asking for your help piecing the mystery together so if you have any information, please give them a shout.