The King Sejong Station (Korean: 세종과학기지) is a research station for the Korea Antarctic Research Program that is named after King Sejong the Great of Joseon (1397–1450). Not actually a cover from the Antarctic Research Station itself but a nice souvenir sheet issued in 2008 for the International Polar Year.
Stamp:
"King Sejong Station, Antarctic" - International Polar Year 2007/2008 (s/s) - Issued: 15-02-2008
Many thanks to Choonjong Park!