With over 400,000 views in only seven days, there’s a good change you’ve already seen this video, but if not, it’s definitely worth 30 minutes of your day. Filmmaker Andrew Wonder follows urban historian Steve Duncan around the New York city underground. With trips to abandoned subway stations, Amtrak tunnels, as well as a trip to the very top of the Williamsburg bridge, this video gives you a look into some of the sections of New York that you’ve probable never seen before.