Hamburg

Hamburg was a city in Germany.

The Sixth Doctor jammed with the Beatles in Hamburg before they were successful. (PROSE: Gone Too Soon)

Hamburg was also home to the Pfannkuchen, a doughnut shop in reality secretly the spaceship that brought the Common Men to Earth. (AUDIO: 1963: Fanfare for the Common Men)

In the 21st century, due to its cold climate and northern latitude, the Ice Warriors sent their seed pods here to create an atmosphere lethal to humans, but which the Ice Warriors could thrive in. This was foiled when the Second Doctor used the Weather Control Unit to destroy the pods with rain. (TV: The Seeds of Death)