Using Giant Mirrors to Light up Dark Valleys

The villages of Rjukan, Norway, and Viganella, Italy, are both situated in deep valleys where mountains block the sun's rays for up to six months every year. To illuminate those darker winter months, the two towns have built gigantic mirrors that track the sun and reflect daylight downwards. Viganella completed its huge computer-controlled mirror in 2006, and Rjukan followed suit just this month, mounting a mirror that will reflect a 600 square meter (6,500 square foot) beam of sunshine into the town square below.

Read more
Hints: View this page full screen. Skip to the next and previous photo by typing j/k or ←/→.

Most Recent

  • Anne-Marie Sorvin / USA Today Sports / Reuters

    USA Wins the 2015 Women's World Cup

    On Sunday, the United States defeated Japan 5-2 to take their third World Cup title in front of 53,300 spectators at BC Place Stadium in Vancouver, Canada.

  • Kirill Kudryavtsev / AFP / Getty

    Photos of the Week: 6/27-7/3

    A European heat wave, lightning over California, a building made of 8,500 beer bottles, shrimp fishing on horseback in Belgium, the first-ever White House Campout, mine detection rats in Cambodia, and much more

  • Olivier Morin / AFP / Getty

    All-Request Photos: Sharks, Intoxication, Guacamole, Soccer, Scalia...

    Reader requested images, including playful raccoons, Soviet armies leaving Lithuania in the 1990s, Donald Trump’s hair, a Fennec fox, and much more.

  • Lewis Hine / Library of Congress

    Child Labor in America 100 Years Ago

    In 1908, photographer Lewis Hine traveled across the U.S. to document child laborers and their workplaces. His portraits were used by reformers to drive legislation that would protect young workers or prohibit their employment.

Join the Discussion