Giant Mirror for Sun-Deprived Italian Village.

From the website:

A sun-deprived village in the Italian Alps has come up with a novel solution to fix the problem – by installing a giant mirror.

The mirror – an eight-by-five metre (26×16ft) sheet of steel – was placed on a nearby peak to reflect sunlight onto Viganella’s main square below. The computer-operated mirror will now be constantly following the sun’s path.

Viganella sits at the bottom of a steep valley, and surrounding mountains cut off direct sunlight during the winter.

Link