Rjukan, a town located 3 hours north-west of Oslo, Norway, is known as one of the darkest cities on earth.
There are around 3,386 inhabitants in Rjukan.
The town has no direct sunlight from September to March because of the mountains surrounding it.
In order to give the locals at least a bit of sun, the town has provided 5 million Norwegian Kroner to place and install mirrors in the mountains that mimic sunlight.
These solar-powered mirrors that are placed 450-meters above the town track the movement of the sun across the town
As a result, the sunlight shines down on the town square.