Geneva

Geneva was a city in Switzerland located close to the French border. (AUDIO: Death in Geneva) It was best known for being home to the international headquarters of UNIT. (TV: Spearhead from Space, et. al.) During the Brigadier's tenure with UNIT he consulted frequently by phone with Geneva. (TV: Spearhead from Space)

Geography
Geneva was home to both UNIT HQ (TV: Spearhead from Space, et. al.) and Space Command HQ. (TV: The Tenth Planet)

Landmarks in Geneva included the Palace of Nations. The city also contained the University of Geneva. (AUDIO: Death in Geneva)

History
In 2009, after turned humanity into "the Master Race", he consulted with a UNIT officer in Geneva. (TV: The End of Time)

Alternate timelines
During the Year That Never Was, which incorporated the Toclafane invasion, the population of Geneva was massacred. (TV: The Sound of Drums)