Denmark

Denmark was a nation in Scandinavia. (PROSE: The Real Hereward)

The Fourth Doctor's Five Hundred Year Diary had details on a bank holiday he once spent in Denmark. (PROSE: The Not-So-Sinister Sponge)

Captain Jack Harkness mentioned Denmark in one of his Monster Files. (WC: Captain Jack's Monster Files)

The Tenth Doctor told Martha Jones he had once seen Mika at a live concert in Denmark. (PROSE: The Pirate Loop)

In 2009 on a Wednesday in September at 8:40AM GMT, Denmark was among the numerous places across Earth in which RTAs occured as a result of the 456 compeling every human child to suddenly stop and proclaim their message: "we are coming." (TV: Children of Earth: Day One)