Arctic
2) Mainframe's base
The Arctic, containing the North Pole, is the northern most region of Earth. Temperatures there are well below the freezing point of water and it is an extremely dangerous place for humans.
If you're a flying Transformer, there is a good chance you've crashed here at some point.
Fiction
Generation 1
Cartoon continuity
Years before the Great War, Starscream and Skyfire surveyed the Earth in a scientific expedition. During their survey, Skyfire crashed in the Arctic. Starscream searched for his friend for some time, but couldn't find him. Millions of years later, the Decepticons, while trying to drain Earth's core of heat energy, discovered Skyfire. He was convinced to join the Decepticons out of his friendship with Starscream, but later turned on them for their ways. All he got for his trouble was being reburied under the ice. Fire in the Sky
Later, the Autobots unburied Skyfire...when they needed a ride to South America. They couldn't have done that sooner? Fire on the Mountain
The Headmasters cartoon
The Final Showdown on Earth (Part 2)
Dreamwave continuity
Movie continuity
Movie Prequel Comic
Questing after the All Spark, Megatron approached Earth, but hit a "radiation blind spot" in the planet's upper atmosphere, and lost track of the cube. He made his landing near the planet's north pole. Unfortunately, he landed on relatively thin ice, which quickly gave way under his weight and the heat from his atmospheric entry. The freezing water quickly sent his systems into a dormant state somewhat akin to stasis lock. Prime Directive #2
Transformers
Thousands of years later, Archibald Amundsen Witwicky led the National Arctic Circle Expedition to chart the Arctic circle. While there, he discovered Megatron, who subsequently burned the location of the All Spark into Witwicky's glasses. Transformers
Ghosts of Yesterday prequel novel
Sector Seven established the Sector Seven High Arctic Base (SSAB) in the arctic where they kept the Ice Man in deep freeze. In 1969 Ghost 1 was launched from this base at the same time Apollo 11 was launched from Florida. Also in that year, the Ice Man was moved to a secret base near Las Vegas Nevada. The SSAB was closed soon thereafter. Ghosts of Yesterday
Rise of the Chevy Autobots
Mainframe had a secret base in the arctic. Transformers: Rise of the Chevy Autobots
Footnotes
- ↑ This location comes from the Transformers (Glu) game, it includes Witwicky's base camp, and the ice cave where Megatron had been found. Unfortunately this location is landlocked and cannot possibly be correct. The map used by the game shows the Greeland landmass... but not the ice sheet, which is probably the source of the boo-boo.
