The title marked on this slide in pencil is 'Waterfall at Olden'. I therefore did a google search for just that phrase and found a whole series of images of a huge waterfall at a town called Olden in Norway which doesn't look like this picture at all. I did wonder however if this could be the same place but further along the river ? The other scenery does look as if it could be Norway, with the mountains and the style of the cabins.