The arctic zone of Centuria was located in the planet's northern hemisphere. It was sparsely populated by people, since Centuria was primarily a human holiday colony, but was rich with the natural resource hargstone. The region was also home to the planet's native ice snakes.
In the 41st century, Cybermen created a large number of semi-human cyber-drones, who they sent to mine the hargstone. These mines were eventually sealed by Homaj while the Tenth Doctor and Jayne Kadett made their escape. (COMIC: Enemy Mine)