One-hour tours of the UN's international headquarters' building and grounds, including the renovated General Assembly Hall and the Security Council Chamber (meetings permitting), are conducted in one of 12 languages. The newly renovated Visitors Centre features a bookstore, a gift shop, a café and a post office, where postcards can be mailed with UN stamps. Tours: Mon-Fri 9 am-4:30 pm. $22 adults, $15 seniors (60+)/students, $13 children 5-12. Children under 5 not admitted.