Why This Illinois City Built a Gate to Seal Itself Off

At the southern tip of Illinois, where the Mississippi and Ohio Rivers converge, lies the city of Cairo, which once depended on the Big Subway Gate for flood defense. This massive iron barrier was designed to be lowered into position, effectively isolating the city during severe floods and transforming it into a fortified island. This episode delves into Cairo's evolution from a swampy misstep to a Civil War stronghold, the significance of its strategic location, and the role of the Big Subway Gate in efforts to manage the threat posed by two of North America's most treacherous rivers. It is a narrative of survival, decline, and a forgotten structure that continues to dominate the cityscape today. #CairoIllinois #AmericanHistory #HistoryDocumentary Learn more about your ad choices. Visit megaphone.fm/adchoices