If you ask tourists what is the most known in my city, they will answer:
the UNO Building of Geneva !!
The United Nations Office at Geneva (UNOG) is the second-largest of the four major office sites of the United Nations (second to the United Nations Headquarters in New York). It is located in the Palais des Nations building constructed for the League of Nations between 1929 and 1938 at Geneva in Switzerland, and expanded in the early 1950s and late 1960s.
Besides United Nations administration, it also hosts the offices for a number of programmes and funds such as the United Nations Conference on Trade and Development (UNCTAD), the Office for the Coordination of Humanitarion Affairs (OCHA) and the Economic Commission for Europe (ECE).
The United Nations and its specialized agencies, programmes and funds may have other offices or functions hosted outside the Palais des Nations, normally in office spaces provided by the Swiss Government.