In upland areas springs and streams are everywhere you would be hard pressed to find any prehistoric site in these areas that are not close to a spring or stream , that does not make them "sacred" .
Interestingly enough the site that this is all centered upon , Stonhenge ,has nothing in in the area that could even be considered a spring or stream , it is a very "dry " area . So we don't have to worry about whether there is any any sacred waters associated that monument .One would imagine the builders , if they really were doing as is suggested by the current tv interpreters , might have chosen a spot with some similar springs just like back home ,and convenient enough to pour over the "healing "bluestones