'Polheim'

Wednesday marks the 100th anniversary of explorer Roald Amundsen becoming the first to reach the South Pole. In this image Amundsen, Helmer Hanssen, Sverre Hassel and Oscar Wisting (left to right) are pictured at "Polheim," the tent erected at the South Pole on December 16, 1911. The top flag is the Flag of Norway; the bottom is marked "Fram."

Amundsen disappeared aboard a French Latham 47 flying boat in the Barents Sea on June 18, 1928. The plane had been searching for the gas-filled airship "Italia," which crashed when returning from the North Pole during an expedition led by Italian aeronautical engineer Umberto Nobile.