United Nations headquarters

However the United Nations headquarters is situated in New York, it is not New York. The area around the buildings is international territory, and controlled by the United Nations. It has served as the headquarters of the United Nations since its completion in 1950

San Francisco, Chicago, Philadelphia, Flushing Meadows, Corona Park in Queens, and even the Black Hills of South Dakota were all proposed as sites for the United Nations Headquarters before Manhattan was finally decided upon.
While the Secretariat Tower is the most important building, you can also find the General Assembly Hall, the Dag Hammarskjöld Library, as well as the Conference and Visitors Center. Just inside the perimeter fence of the complex stands a line of flagpoles where the flags of all 192 UN member states, plus the UN flag.