Every year, over 1 million visitors from around the world visit United Nations Headquarters (UNHQ), an international territory belonging to the 193 Member States of the UN. A one-hour guided tour of the United Nations offers an exciting opportunity to discover the UN Headquarters. One of their multilingual tour guides will take you on a brief journey through the corridors of international diplomacy. You will learn about the history and work of the United Nations, and visit the famous General Assembly Hall and Security Council Chambers (meetings permitting). Purchase your tickets online. All visitors to the United Nations 18 years and older require government-issued photo identification.