I spent the 2002 Antarctic winter at Halley Research Station on the Brunt Ice Shelf at 76°S 27°W. It's quite an amazing place - there's over a metre of snow accumulation each year and so the buildings are built on stilts. The sun is below the horizon for 105 days each winter and the coldest temperature we had was -51°C, which we celebrated by streaking around the outside of the main building.
View Halley on a map.