River Run James Keelaghan.
The first verse:-

River of blue, cut through the valley,
swept pass the willows and the sandy bar,
ran so swift, locked in my memory,
but the way things were is not the way things are.
We used to swim in the crook of it's arm
in the summer heat who could be blamed?
Avioded the rapids the best that we could,
never thought that that stream could be tamed.

Past the Point of Rescue Mick Hanly

or any song that the writer makes you stop think and take a look at the wider picture as well as one self.