Imagine a very different New York City—one whose streets are filled with horses and buggies and people on foot. Now imagine the vehicles that shared the road—block-long freight trains trying to deliver goods to the west-side factories. How did New York in the 1800s solve the problem of trains barreling through busy city streets? They built the High Line. But the High Line’s story doesn’t end there. Once cars became common, innovative New Yorkers began to find and fight for new ways to breathe life into the old, raised train tracks.