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Glacial Potholes, Interstate Park, Minnesota
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Over 200 potholes of various sizes can be found carved into the basalt bedrock at Interstate State Park. These holes were drilled by the powerful waters of the Glacial St. Croix River 10,000 years ago. Where water and sand swirled, a pothole was formed. Trails within the Glacial Potholes Area wind for less than half a mile along the St. Croix River. Along these pathways, you'll find hidden steps from the park's early days, beautiful overlooks, and potholes with unique names such as the Cauldron, Bake Oven, and the Devil's Parlor. The deepest explored pothole in the world is also here—the 60-foot deep "Bottomless Pit!"
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