I am not quite sure what this is, but I think this used to be a small hydroelectric plant in the Maule River near the town of Colbún. In the mid eighties, it was replaced by a far bigger one, about 4,5 km up-river, to form the Colbún storage lake, the largest of this type in Chile.
We stumbled by accident on this location – literally covered with debris and garbage – and it took some serious Photoshop to reveal the sensation of abandonment and gloom that surrounds this epic monument to downfall.