I recently bought Ingrid Burrington's book Networks of New York and have been utterly fascinated by the things she reveals in it. Basically, she makes sense of all of those crazy orange markings one might see spray painted onto the street and sidewalks. I've always assumed that those markings were done purposefully and they are -- they reveal a very hidden infrastructure of internet, cable, and telecommunication lines that run all over the city. The book is super short and more of a glossary of sorts which means you should definitely pick one up and carry it with you the next time you walk around your neighborhood.
Gizmodo recently caught up with Ingrid to listen to her talk about all of these wonderful hidden secrets about NYC. My kind of human!