LONDON, ENGLAND - MAY 22: A woman swims in the new 'King's Cross Pond Club' outdoor swimming pool on May 22, 2015 in London, England. The 40 metre pool is purified using submerged plants to filter the water and is surrounded by flowers and plants. It is open to members of the public Monday and Friday between 6am and dusk. (Photo by Dan Kitwood/Getty Images)
