On a bright October morning in 1914, a 28-man British crew led by veteran explorer Sir Ernest Shackleton departed Buenos Aires on the Endurance with the goal of becoming the first expedition to cross Antarctica via the South Pole. Before reaching shore, though, they had to negotiate massive glaciers and cut through 1,500 miles of packed ice, a task the ship wasn't up to performing. Held frozen in a sea of icebergs for nine months, the crew tried haplessly to cut a path to free Endurance, only to watch it slowly get crushed and sink into the ocean. Only slightly less miraculous than their eventual rescue was the survival of incredible footage shot by popular Australian photographer Frank Hurley and later assembled into South (1919), a gripping travelogue recently restored from surviving prints and original glass slides. When the ship went down, Shackleton and five others took the largest lifeboat and journeyed 850 miles to South Georgia Island to get help while the rest were stranded on Elephant Island, all presumed dead. Hurley stashed the undeveloped film in snowdrifts for safekeeping, and most of it survived, including unforgettable images of crew members staking tents on moving ice floes and month-by-month photographs of the ship as it is seized by icebergs. South ends with an amusingly ironic coda claiming that the adventures of Shackleton and company "will be remembered as long as our Empire exists." Thanks to the painstaking efforts of the British Film Institute, Hurley's film will presumably last quite a lot longer.