Alexander Chen’s “Conductor” recreates the New York subway map as a musical instrument, with subway lines as pluckable strings. It’s based on Vignelli’s 1972 subway map, which makes sense for this kind of project. It’s a work in progress, and we can’t play with it yet, but he’s got a couple of videos. This one demonstrates the piece:

And this one has the strings triggered by passing subway trains:

Via Google Maps Mania.