Antarctica

Antarctica is an Earth continent.

History of Antarctica
12 million years ago, future Time Lords set up a base in Antarctica and attempted to free the Fendahl for use against the Enemy. (EDA: The Taking of Planet 5)

In 1976, two Krynoid pods were discovered in Antarctica. (DW: The Seeds of Doom)

In 1986, the Cybermen attacked the Snowcap space tracking station. (DW: The Tenth Planet)

In 2006, the FLIPback project was based in Antarctica. (NA: Iceberg)

In 2595, Bernice Summerfield visited Antarctica. (BNA: The Sword of Forever)