I’m back in a New York state of mind, writing about my day in Harlem with Matt Green. Matt, you may recall, is walking every street of every borough, a quest that’ll take him about four years, during which he’ll walk about 8,000 miles. Along the way, he’s noticing all the little things that make New York such as fascinating city. Such as the variety of anti-sitting devices that deter pedestrians from resting their behinds on apartment building standpipes. In the below video, he explains. (The above pic, by the way, is one of the NYDP’s SkyWatch towers. More on them later.)