Antarctica: Way South on Skis New this year; Physically Challenging Celebrate the 100th anniversary of Norwegian explorer Roald Amundsen’s arrival in the South Pole on December 14, 1911, by skiing the last 12 miles to the very bottom of the world. A series of charter flights will take you from Punta Arenas, Chile, to 89° 45’ S, where you’ll strap on a pair of skis and head south, camping along the way. PolarExplorers: “Centennial South Pole Expedition,” 8 days; $52,500. http://travel.nationalgeographic.com/travel/tours/pacific-oceania-tours-...