Berlin

Berlin was the capital of Germany and its largest city.

In 1938, the Eleventh Doctor crashed the TARDIS in Berlin. (DW: Let's Kill Hitler)

In 1939, the Seventh Doctor and Ace visited Berlin. (NA: Timewyrm: Exodus)

In the 1960s, Jack Harkness and Christopher Isherwood went cruising on the when they visited Berlin. (TW: Reset)

In the 21st century, due to its cold climate and northern latitude, the Ice Warriors sent their seed pods to Berlin to create an atmosphere lethal to humans, but which the Ice Warriors could thrive in. (DW: The Seeds of Death)