Why does Moyamensing Avenue run diagonal? What’s up with all of those funky intersections along Ridge Avenue? Contributor Tony Aiello tracks down traces of our street system from a time before the city’s grid

If you’ve ever feel like the city is just a tad off we have validating news for you. Philadelphia was built a few degrees left from its true north axis point. Contributor Joe Brin talks cartography and William Penn’s city plan with Frank Morelli, Survey Bureau manager of the Streets Department

Philadelphia was largely spared by Sandy, while its erstwhile neighbor to the north was not. Does this have something to do with urban geography?

Tonight at 7:24, the sunset will align with the city’s street grid. It’s a phenomenon called “henge,” for Stonehenge, and it happens several times a year. Michael Burlando explains

Our grid a compromise with nature, New York’s “obliteration,” and a “creative template”