Greenland

Greenland was an island in the middle of the North Atlantic Ocean. (PROSE: Who Discovered America?) It was considered part of Denmark. (GAME: Blood of the Cybermen)

History
The Vikings landed in Greenland. (PROSE: A History of Humankind) In 1002, the First Doctor, Susan Foreman, Ian Chesterton and Barbara Wright visited Greenland and met Eric the Red, convincing him to take them to Newfoundland to obtain the plutonic ore the Doctor needed to refuel the TARDIS' batteries. (PROSE: Who Discovered America?)