The incredible story of the Endurance trapped in an Antartic ice pack in 1915.

As if the ship and its crew had not been plagued by enough of it already, heavy pack ice was again sighted, and hours later a blowing gale reared its ugly head. For two days, the Endurance took shelter under an unlikely aegis – dodging to and fro under the lee of a stranded iceberg. As the gale eased, the ship made crawling headway towards her Antarctic destination, now just one day’s sail distant. On encountering the ice pack once more, Shackleton opted to work through it, but with temperatures plummeting, there would be no escape from its icy squeeze.

Photos are by one of the crewmen, Frank Hurley.