The Headquarters of the United Nations is located in the Turtle Bay neighborhood in Manhattan. According to a treaty between the United States and the United Nations, the buildings and lands occupied by the organization have extraterritorial status, meaning they do not fall under the jurisdiction of the US government. The main headquarters complex comprises several buildings including the General Assembly Building, the Conference Building, the Secretariat Building, and the Dag Hammarskjold Library. Visitors can tour most of these places when the various UN organs are not in session. One popular sightseeing attraction is viewing the flags of all the member states, which are arranged in English alphabetical order and line the UN grounds along First Avenue.