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Beneath cities, landmarks, and even ordinary neighborhoods lies a hidden world that most people never see—networks of tunnels built for transportation, security, survival, or purposes still debated today. In this episode, we explore the stories, theories, and documented histories behind underground passageways, from wartime escape routes to rumored secret corridors connecting powerful institutions. We also examine why hidden tunnels continue to capture the public imagination. Are they simply relics of the past, or do some still serve undisclosed purposes? By separating verified facts from speculation, this episode invites listeners to question what lies beneath their feet—and how much of it remains intentionally out of sight. Hosted by Simplecast, an AdsWizz company. See https://pcm.adswizz.com for information about our collection and use of personal data for advertising.
