Instagram-worthy pool in the Peak District are in fact submerging themselves in what has been dubbed as 'probably the most dangerous water in the UK'.Harpur Hill Quarry's freezing cold water is said to have old cars, animal carcasses and even excrement beneath its surface, and its caustic cocktail of chemicals can cause skin irritations, thrush or sickness.Despite police cordoning off nearby parking last year and local authorities turning the lake black, visitors have returned with the recent heatwave.Not only swimmers throwing their bodies into a stagnant water with high alkaline pH levels, neighbouring residents have previously complained of receiving abuse and litter including barbecues and drug paraphernalia.Derbyshire Police are once.
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