Boys jump into the Works Swimming Pool in the yard of the former coking plant of the Zeche Zollverein UNESCO world heritage site in Essen, Germany, July 1, 2015. The Works swimming pool created by the two Frankfurt artists Daniel Milhonic and Dirk Paschke is made of two regular ship containers. The 13 by 5 m long, 2.4 m deep pool is open during the summer and admittance is free of charge. (Photo by Wolfgang Rattay/Reuters)
