Why Detroit has 100 Miles of Secret Tunnels Below the City

Deep beneath the bustling streets of Detroit lies a subterranean world that many residents don't even know exists. For over a century, a massive network of salt mines has expanded into a 100-mile labyrinth, creating what many call a Secret City 1,000 feet below the surface. In this documentary, we explore the industrial history of the Detroit Salt Mine, from its discovery in the 1800s to its role in the first-ever road salting project. You will learn how a 400-million-year-old inland sea became the foundation for a massive underground infrastructure featuring 60-foot-wide causeways and towering salt pillars. #history #detroit #hiddenhistory Support the Channel by becoming a member 👉    / @itshistory   Request an episode here 👉 https://forms.gle/siuafjjyP8iHjQ2MA IT’S HISTORY - Weekly Tales of American Urban Decay as presented by your host Ryan Socash.    • IT'S HISTORY 🔥 Trending   » Subscribe:    / @itshistory   » Listen podcasts: https://ffm.bio/itshistory » CONTACT For brands, agencies, and sponsorships: [email protected] Click here to book a sponsorship with me http://thoughtleaders.io/reserve/its-... » DISCLAIMER Some media elements in this video are used under the fair use provisions of U.S. copyright law (Title 17, Section 107) for purposes of commentary, criticism, and education. If you believe your image or content was used in a way that violates your rights, please contact us at [email protected] » CREDIT Scriptwriter - Ryan Socash Editor - Karolina Szwata Host - Ryan Socash » NOTICE Some images may be used for illustrative purposes only - always reflecting the accurate time frame and content. Events of factual error / mispronounced word/spelling mistakes - retractions will be published in this section.