freediving pennsylvaniaA freediver ascends from the deep chilly thermocline in Dutch Springs. The Freediving Dutch Springs lake, located in Pennsylvania, was originally a site used for mining limestone and manufacturing cement. In around 1933 the area began to fill with water and for the remainder of the quarry’s operational life, water had to be continuously pumped out. When the cement company shut down in 1970, the pumps shut down as well and the now 50-acre quarry filled with water.