Always talk to the locals; especially when they have a lovely, very friendly dog, from whom there's no escape. Long story short: we were recommended that once we're up at the lake, take the bridge and the trail that goes next to the abandoned building you see on the picture - it is supposed to lead to a whole abandoned mining town. Given the weather - misty, with low hanging clouds - it would have been a hell of an experience.
Unfortunately, we couldn't do this: there was no bridge. So much rain had fallen there recently, that the bridges were literally washed away, or sunked into the lake.