it's known as the 'Blue Lagoon', but the flooded former quarry near Buxton hides a toxic secret.
It's so polluted that it's almost as toxic as bleach.
There are warning signs that state the water can cause skin and eye irritations and stomach problems, but people continue to swim there.
More top news
A memorial to railwaymen who died in the Great War is being unveiled today and the grand-daughter of one of the fallen will do a reading.
Three people have been arrested in connection with the discovery of a man's body in a reservoir
Some cloud around for midweek but warmer air, lighter winds & mainly dry conditions will make the second half of the week feel very pleasant