Astronaut Ivan Vagner captured from ISS Antarctic Peninsula which extends in “S” shape of west Antarctica. This is the area Irish Ernest Shackleton led British expeditions to the Antarctic in 1914-1917. As ISS does not go over high latitude areas it is difficult to capture Antarctica.

Antarctic Peninsula is in the warmest area in the continent and many research stations have been established since 1820. Argentina, UK and Chile make territorial claims. The peninsula is highly mountainous and these mountains are considered to be a continuation of the Andes of South America.
The local scenery on the ground is as follows.
Reference: Ivan Vagner’s Tweet
See earthview photo gallery: LiVEARTH