The Headquarters of the World Organization is located on an 18-acre site on the East side of Manhattan. It is an international zone belonging to all Member States. The United Nations has its own security force, fire department and postal administration. Visitors from all over the world often like to send postcards back home with United Nations stamps - these stamps can only be mailed from the United Nations.

Guided tours of the United Nations operate daily from the General Assembly Public Lobby. An international staff explains the work of the United Nations and its related organizations, while taking visitors to some of the main Council Chambers and the General Assembly Hall. The tour also features art and other objects of interest donated by Member States.