About 150,000 years ago, the area that is now known as Monroe County in southwest Illinois was covered in ice hundreds of feet thick. When the ice melted, the water flowed into fractures in the area’s ...
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Illinois' Coolest Underground Destination Is This Stunning Geological Wonder Full Of Unique Wildlife
Since 1901, travelers have been making their way to a secluded spot in Monroe County, Illinois, about 45 minutes south of St. Louis, Missouri. Their goal isn't to go boating on the nearby majestic ...
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