Back for its second year, this epic challenge of endurance and sheer will power sees teams of up to 8 swim for an hour each, for 24 hours, in a cold lake. Yeah, I know. Ridiculous.

But we love them and it just goes to show how swimming can appeal to everyone in very different ways. From swimming unbelievable challenges like this to learning for the very first time. The power of swimming is immeasurable and the joy it brings is unquestionable.

For these incredible swimmers, the money they raise will go towards swimming lessons for children with disabilities. They're swimming through pain, cold and dark so children with disabilities can learn. And we think that's pretty wonderful.