Where the Sun Don't Shine

Viganella, Italy has been completely dark for most of the winter for the last 800 years. The sun is completely blocked out by the mountains in the winter. This year, thanks to some creative thinking, a few big mirrors, and a computer, they'll have sunlight. Once they realize how easy it is to see all the dust in the sunlight, they'll probably decide to go back to darkness rather than do all that cleaning.