On the easternmost crest of Minnesota , not far from where the land fill Lake Superior and the United States meets Canada , the Brule River meets its own dividing melody .
As the river ca-ca its way to the large of the Great Lakes , it drop rapidly—800 feetin an 8 - mile straddle . At one point in the journey , the Brule River encounters a large cluster of rhyolite rock and diverges into two river with two very dissimilar personality . One is a well - bear , 50 groundwork waterfall and the other ? Well , the other is the cause this arena is sleep with as Devil ’s Kettle Falls .
The western side of the rent driblet into a elephantine mess , quaff up monolithic amounts of pee and taking them to a piazza that ’s yet to be discover . The disappearing act has perplexed onlookers and scientists for years . Dyes and ping pong balls have been pluck in with the intent of tracing the path of the water , but were never insure again . While it ’s assumed the pothole somehow finds an underground mercantile establishment beneath Lake Superior or reunites with its other one-half , so far the track remains cold .
Riverbed potholes ( or kettles)aren’t uncommon , but they ’re usually only airfoil wearing away and not intact channels through which water can flow . Other explanation such as a fault strain , a secret cave , or a lava tube have beenlargelydismissed , leaving the mystery wide open . One ( highly unlikely ) legend states that someone even pushed a car into the crack in pursuit of the truth . GPS and cameras are depict useless once they ’re subterranean , and the nature of the chasm name it insufferable for humans to derive and follow the track . Which means for now , it ’s just another one of Mother Nature ’s great puzzle .
Since a photo does n’t really do justice to the phenomenon , here are a couple of videos so you could see the Devil ’s Kettle in activity .
