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Such disturbing warning signs can be found around Johnson's Shut-Ins State Park in Missouri. As soon as the siren sounds, you must immediately leave the area. This is exactly what this sign warns about. Curious why? Nearby, on the top of a hill, there is a huge man-made reservoir called Taum Sauk, which once caused a local disaster. #ItInteresting Anyone who wants to support our channel can become a sponsor! / @tointeresujace7074