Jefferson University’s design lab, The Vault, is as hidden as it gets. Housed in a steel vault within the Old Federal Reserve Bank of Philadelphia, the think tank and maker space seeks to bridge the divide between between traditional healthcare and budding technology. Hidden City editor Michael Bixler takes us inside

Sandy Calder, the youngest of three generations of Philadelphia artists bearing the name Alexander Calder, transformed modern sculpture with his mobiles. Believe it or not, his largest one—the largest interior mobile in the world, in fact—is here in Philadelphia. Brad Maule passed the security check at the Federal Reserve Bank of Philadelphia to profile White Cascade

New research corroborates what seems obvious: your neighborhood impacts your life chances