Härdangerjøkulen Glacier

(Hoth Ice Planet Location from The Empire Strikes Back)

From http://www.starwars.com/databank/location/hoth/?id=bts:

The Hoth battle sequences were filmed on location atop the Härdangerjøkulen Glacier in Finse, Norway. The locale was located about four miles (6.4 kilometers) from the ski lodge that served as production headquarters. Formed of stark blue ice, and 6,000 feet (1,800 meters) high at its summit, the glacier required very little visual effects work to transform it into the ice planet of Hoth. The production crew had to endure subzero temperatures, chilling winds and the occasional avalanche.