Antarctica

Antarctica was a continent on Earth. The South Pole was located there.

Distant past
12 million years BC, Time Lords from the War's future set up a base in Antarctica and attempted to free the Fendahl for use against the Enemy. (PROSE: The Taking of Planet 5)

While battling Ice Warriors in Antarctica, the Seventh Doctor and his foes became frozen solid in Antarctic ice, where they would remain comatose for millions of years. (AUDIO: Frozen Time)

During the Eocene Epoch, the Silurians had at least one city there. (PROSE: The Scales of Injustice)

Circa 20,000 BC, two Krynoid pods fell to Earth there and lay frozen and dormant. (TV: The Seeds of Doom)

Early modern era
In the 17th century a group of Daleks set up an underground base in Antarctica, where they began capturing human ships and their crew and using hypnosis to turn them into slaves. (COMIC: *Sub Zero)

1920s
Some time prior to April 1929, Lord Barset went on an ill-fated Antarctic expedition and discovered a city of intelligent reptiles. The Daily Telegraph reported on 12 April that the expedition was lost. (COMIC: City of Devils, AUDIO: Frozen Time)

1970s
In 1970, the Second Doctor and Jamie McCrimmon encountered the Ice Apes in Antarctica. (COMIC: Ice Cap Terror)

In the 1970s, the Daleks captured a nuclear submarine and left their base to attack Sydney, Australia, destroying a nearby weather station before doing so. (COMIC: *Sub Zero)

Two Krynoid pods were discovered in the Antarctic permafrost. One of the pods germinated in a living human host, Charles Winlett, shortly before the Fourth Doctor and Sarah Jane Smith arrived at the base there. The base was destroyed when Scorby set a bomb on the power lines. After the Krynoid threat was destroyed, the Doctor and Sarah accidentally materialised on the continent due to a fault in the Doctor's TARDIS. (TV: The Seeds of Doom)

1980s
In 1983, the HADS on the Doctor's TARDIS activated when a Soviet submarine at the North Pole during an attack by Skaldak. The TARDIS dematerialised, and reappeared at the South Pole. (TV: Cold War)

In 1986, a landing party of Cybermen landed in a flying saucer and attacked the Snowcap space tracking station shortly after the First Doctor and his companions arrived there in the TARDIS. (TV: The Tenth Planet)

2000s
In 2006, the FLIPback project was based in Antarctica. (PROSE: Iceberg)

In 2009, members of the Blathereen family parked their spaceship there. (TV: The Gift)

2010s
A 2012 expedition by Lord Barset's descendant found the Doctor's TARDIS, as well as a comatose Seventh Doctor suspended within a block of ice. They revived the Doctor from his coma. (AUDIO: Frozen Time)

Post-21st century
In 2595, Bernice Summerfield visited Antarctica. (PROSE: The Sword of Forever)

At an unspecified date, after the United Planets government had come into power, the Anti-Dalek Force, let by Joel Shaw, Mark Seven and Reb Shavron, discovered that the Daleks were using a neutronic power unit to melt the Antarctic ice cap and flood the rest of the world. (COMIC: Flood!!!)

Within 7214, the continent was fully urbanized, aside from a small part of the territory as a nature preserve. In that year, it hosted an invasion of Autons led by the Master, foiled by the Seventh Doctor. (COMIC: Prisoners of Time)

Behind the scenes

 * City of Devils and The Scales of Injustice, both by Gary Russell make reference to Endurance, Nicholas Briggs' AudioVisuals story about a 1920s Antarctic expedition which finds a Silurian city. Nicholas Briggs' Frozen Time functions as a sort of sequel to the story, though it replaces the AudioVisuals Doctor with the Seventh Doctor and Silurians with Ice Warriors. (Although the reference in City of Devils still makes sense.)