The labor camps at Vorkuta were established in 1931 to mine coal deposits at the foot of the Arctic Ural Mountains, 150 kilometers above the Arctic Circle. For 25 years, prisoners and exiles labored to turn this area of tundra into one of the largest coal sources of the Soviet Union. The complex grew to include more than 20 mines, mining villages, power stations, roads, railroads, and the new city of Vorkuta. Today, Vorkuta is an industrial city in decline, plagued by corruption and poverty. These photos show Vorkuta at the height of the Gulag era -- and as it appears now. (17 PHOTOS)