It’s History

Buried nearly 1,000 feet beneath southern Poland lies the Bochnia Salt Mine, one of Europe's oldest salt mines and a UNESCO World Heritage site with a history spanning nearly 1,000 years. This sprawling underground labyrinth stretches 37 miles across 16 levels, with only a fraction accessible to the public.

In this episode, we explore the mine's forbidden corridors, including collapsing tunnels, abandoned leaching chambers untouched since the 1960s, and sacred chapels carved deep into the earth. Discover stories of horses lowered by net into the abyss, steam-powered industrialization under the Habsburg Empire, and an underground railway passing through a consecrated Catholic church.

#History #Poland #HiddenPlaces
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On November 25, 1990, a section of the Lacey V. Murrow Floating Bridge in Seattle collapsed and sank into Lake Washington, an event witnessed live by thousands. The bridge, an essential transportation link since its construction in 1940, folded into a V-shape before disappearing underwater. This episode explores the history of Seattle's floating bridge system, the engineering decisions that contributed to the disaster during renovations, and the lasting significance of the Murrow Bridge sinking as a case study for engineers today.

#Seattle #MurrowBridge #Infrastructure #EngineeringDisaster
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In the middle of the Mississippi River near St. Louis stand two mysterious stone towers known as the Chain of Rocks intake towers. Built in 1894 and expanded in 1915, these structures were crucial for St. Louis’ drinking water system, allowing engineers to draw water directly from the river to the city’s waterworks plant. Inside, keepers lived for weeks operating intake gates and monitoring river conditions while safeguarding the system against floods and ice jams.

This episode of It’s History delves into the story behind the Mississippi River intake towers, exploring topics from Mark Twain’s criticism of the city’s muddy water to the dramatic engineering project that created these fortress-like structures in a dangerous river.

#MississippiRiver #StLouisHistory #EngineeringHistory
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Carved deep into the granite of Colorado’s Front Range lies the Cheyenne Mountain Complex, one of America’s most secretive Cold War creations. Built to survive nuclear war, this underground fortress housed command centers, power plants, reservoirs, and living quarters—an entire city inside a mountain. Protected by 25-ton blast doors and thousands of feet of rock, it became the nerve center of NORAD, monitoring the skies day and night.

Cheyenne Mountain also captured the imagination of the world through its depiction in films like WarGames, Independence Day, and Stargate SG-1. However, life underground was marked by long shifts, sealed doors, and constant vigilance.

Join us as we uncover the full story of America’s ultimate doomsday bunker.

#ColdWar #CheyenneMountain #ItsHistory
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Beneath Chicago’s Cloud Gate lies the city’s dramatic transformation. This episode traces Grant Park's evolution from marshland and post–Great Fire landfill to a bustling urban landmark, exploring Daniel Burnham’s 1909 vision and Montgomery Ward’s efforts to keep the lakefront “forever open, clear and free.”

We examine the deck-over that led to Millennium Park, featuring Frank Gehry’s Jay Pritzker Pavilion, Jaume Plensa’s Crown Fountain, and Anish Kapoor’s Cloud Gate. Additionally, we uncover the hidden world beneath: Millennium Station, the Pedway, garages, and historic freight tunnels. Discover why Chicago’s front yard is both a monument to beauty and a marvel of buried infrastructure.

#Chicago #GrantPark #MillenniumPark
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