Shackleton went to South Georgia and Elephant Island:

"South Georgia is a part of the British Overseas Territory of South Georgia and the South Sandwich Islands, located in the southern Atlantic Ocean, rather than being formally part of Argentina. However, Argentina claims sovereignty over South Georgia.

"Elephant Island is located in the South Shetland Islands, off the coast of the Antarctic Peninsula. It is not part of Argentina but is situated near the continent and is often associated with Argentine expeditions.