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
Police have launched an investigation after a Land Rover was driven into a south Manchester shop front and then set on fire.
The owners of Merseyside's oldest pub have released the note written to them by thieves who raided and flooded their building.
Much milder than Wednesday. Brightening a little for the afternoon.