In this podcast episode, we explore the forgotten underground concourses of Philadelphia. Many of these hidden passageways and tunnels were once bustling with activity, connecting major buildings and transportation hubs. Today, they are largely abandoned and forgotten, but they still hold clues to the city's rich history. We delve into the stories behind these underground spaces, uncovering secrets and mysteries that have been buried for decades. Join us as we journey through the hidden underground of Philadelphia.