(01 of13)
Open Image ModalA 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. (credit:Dan Kitwood via Getty Images)
(02 of13)
Open Image ModalMembers of the East German swimming team swim 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. (credit:Dan Kitwood via Getty Images)
(03 of13)
Open Image ModalA general view at 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. (credit:Dan Kitwood via Getty Images)
(04 of13)
Open Image ModalA member of the East German swimming team leaves 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. (credit:Dan Kitwood via Getty Images)
(05 of13)
Open Image ModalA man showers before swimming at 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. (credit:Dan Kitwood via Getty Images)
(06 of13)
Open Image ModalA member of the public arrives to swim at 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. (credit:Dan Kitwood via Getty Images)
(07 of13)
Open Image ModalMembers of the East German swimming team swim 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. (credit:Dan Kitwood via Getty Images)
(08 of13)
Open Image ModalA member of the East German swimming team enters 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. (credit:Dan Kitwood via Getty Images)
(09 of13)
Open Image ModalMembers of the East German swimming team gather 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. (credit:Dan Kitwood via Getty Images)
(10 of13)
Open Image ModalAn elevated view of 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. (credit:Dan Kitwood via Getty Images)
(11 of13)
Open Image ModalMembers of the East German swimming team jump 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. (credit:Dan Kitwood via Getty Images)
(12 of13)
Open Image ModalMembers of the public use 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. (credit:Dan Kitwood via Getty Images)
(13 of13)
Open Image ModalMembers of the East German swimming team leave 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. (credit:Dan Kitwood via Getty Images)