Geneva was a city in Switzerland where the international headquarters for UNIT (TV: Spearhead from Space, et. al.) and for the International Space Command were located. (TV: The Tenth Planet) During the Brigadier's tenure with UNIT he consulted frequently by phone with Geneva. (TV: Spearhead from Space)
The CIA's files on the Torchwood Institute had referrals going back to Geneva and above. (TV: The New World) During the Toclafane invasion, the population of Geneva was massacred. (TV: The Sound of Drums)
After the Saxon Master turned humanity into "the Master Race", he consulted with a UNIT officer in Geneva. (TV: The End of Time)