The Toxic Blue Lagoon of Buxton

In a disused quarry at Harpur Hill, near Buxton, England, there’s a bright blue lagoon. It looks like a perfect place to cool off in summer. And it is, if you enjoy skin irritation and fungal infections. The quarry lake is a popular swimming spot, despite pollution and its pH level being 11.3, which is highly alkaline (ammonia is 11.5). The attractive blue color is from caustic chemicals in the stone. In 2013 the water was dyed black to deter swimmers, but after a while it turns back to blue.

Video by enyay